Matador arms mat9

The MAT-9 also features a non-reciprocating reversible charging handle. The barrel is made of 4150 steel, also has a nitrided finish and is threaded with the 1/2×28 thread pitch. CZ Scorpion EVO …

Jan 21, 2023 · Matador Arms makes my favorite AR to PCC adapter. It’s a mag block that fits into a mil-spec magwell and allows me to use CZ 75 magazines in my AR. That’s what I knew Matador Arms for, but that was before the MAT-9. The MAT-9 is a AR-9 upper designed to fit any AR 9mm lower. With the MAT-9, a bugger tube is no longer needed, and the entire ... This upper receiver is side-folding compatible and features Matador Arms® patent-pending EZTS™ “Easy Take-down System” with no tools required to break down the upper for maintenance and cleaning. The MAT-9™ is machined for maximum weight reduction, slim profile, and compatibility with bolt catches and lower receivers.Matador Arms manufactures new and exciting firearms accessories for the North... Matador Arms, San Antonio, TX. 3,555 likes · 31 talking about this. Matador Arms manufactures new and exciting firearms accessories for the North American market.The MAT-9™ 9mm AR upper is compatible with AR-9 Lower receivers in any double-stack magazine configuration: Glock ®. Sig Sauer ®. Colt® Stick Magazines. HK® MP5™. CZ ® Evo Scorpion™. With an AR-15 Lower Receiver it requires our Mag-X™ magazine conversion kit or equivalent type product such as Endomags. Some Additional Key …Call: 707-416-8847 Email: [email protected]. Address: 10564 Sentinel Drive San Antonio, Texas 78217. Please select your productThanks Man! Matador Arms Mat9 upper 575 at mmc armory Vortex strikefire 199 MKM Machining Pistol Grip 60 EPC lower set up 250 Supressor was like 999 i think.Crafted with precision, the AR9 pistol grip features an ergonomic design that promotes a natural and secure grip. Its textured surface provides a non-slip grip, ensuring stability and confidence during rapid-fire or extended shooting sessions. Aesthetically appealing to the overall appearance of the MAT-9 and any AR-9 set up.Shop Matador Arms Mat-9K 5 inch 9mm Upper Reciever | Up to 17% Off Customer Rated on 1 Review for Matador Arms Mat-9K 5 inch 9mm Upper Reciever + Free Shipping over $49. ... Matador Arms MAT9 Features 00:59. You May Also Like Best Rated. Valiant Dynamics EvolvR Telescoping Combat Stock, Black, Mil-Spec Buffer Tube, E111-00-M …

In this episode, we're diving into a variety of new and exciting products that you won't want to miss! Matador Arms MAT 9 Upper Receiver: A 9mm upper that's compatible with Glock mags and more. No buffer tube needed! Brownells BRN22 Bolt Lineup: Now in titanium nitride for that golden finish. Brownells Offset Retaining Pin: A simple solution to ...Matador Arms would like to proudly introduce the MAT-9, the NEXT Generation blowback bufferless and monolithic (self-contained) upper receiver for lower receivers and almost all 9mm magazines. This upper receiver is side-folding compatible and features Matador Arms® patent-pending EZTS Easy Take-down System with no tools required to break …Thanks Man! Matador Arms Mat9 upper 575 at mmc armory Vortex strikefire 199 MKM Machining Pistol Grip 60 EPC lower set up 250 Supressor was like 999 i think.In this episode, we're diving into a variety of new and exciting products that you won't want to miss! Matador Arms MAT 9 Upper Receiver: A 9mm upper that's compatible with Glock mags and more. No buffer tube needed! Brownells BRN22 Bolt Lineup: Now in titanium nitride for that golden finish. Brownells Offset Retaining Pin: A simple solution to ...We stopped by the @matadorarms100 booth at @TriggrconKansas 2023 to check out their new line of PCC uppers! Let us know what you all think.Get Your SG Shot ...

The MAT-9™ 9mm AR upper is compatible with AR-9 Lower receivers in any double-stack magazine configuration: Glock ®. Sig Sauer ®. Colt® Stick Magazines. HK® MP5™. CZ ® Evo Scorpion™. With an AR-15 Lower Receiver it requires our Mag-X™ magazine conversion kit or equivalent type product such as Endomags. Some Additional Key Features:Aug 26, 2021 · The Montgo-9 upper receiver is made of aluminum, and the bolt and trunnion are 4140 steel for durability. Weight is 3.5lbs with an OAL of 12.125” and a 1.47” width. The Montgo-9 adds to Matador’s 9mm product offering. Matador recently announced their AR-9 80% billet lower receivers, the first run of which is shipping mid-September.\. We take a first look at the Matador Arms MAT-9 AR9 upper receiver that works with virtually all popular magazines 🇺🇸Nine Line Apparel shirts: (discount cod...Mat9 r/AR9 • Mat9. upvotes ... Post your Matador Arms builds and questions! Members Online. Adding roller delay inexpensively upvote ...10 Jan 2023 ... The MAT-9™ is machined for maximum weight reduction, slim profile, and compatibility with bolt catches and lower receivers. The upper is also ...

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Matador Arms, San Antonio, TX. 3599 likes · 2 talking about this. Matador Arms manufactures new and exciting firearms accessories for the North American...Matador Arms would like to proudly introduce the MAT-9, the NEXT Generation blowback bufferless and monolithic (self-contained) upper receiver for lower receivers and almost all 9mm magazines. This upper receiver is side-folding compatible and features Matador Arms® patent-pending EZTS Easy Take-down System with no tools required to break …The good news was, Matador Arms, the manufacturer who made the BRN-9 for Brownells was taking pre-orders for an improved version of the same upper now released called the Mat-9K. I pre-ordered one a few days before release and it came in $100 cheaper then Brownells sold them for plus I got 15% off via a discount code a …Description. This upper receiver is side-folding compatible and features Matador Arms® patent-pending EZTS™ “Easy Take-down System” with no tools required to break down the upper for maintenance and cleaning. The 9mm upper is machined for maximum weight reduction, slim profile, and compatibility with bolt catches and lower receivers.

The Mat9 doesn't have LRBHO built into the upper receiver, you need to pair it with a functional LRBHO system in the lower. There's a few out there, Matador Arms claims it's fully functional with most 9mm lower receivers. I can think of a few from Spikes Tactical, Angstadt Arms, probably New Frontier Armory, and 80% builds if you want to go ...When it comes to quilting, having the right machine can make all the difference in achieving professional-looking results. With so many options available, it can be overwhelming to...The MAT-9 is a blowback AR-style upper that is compatible with folding buttstocks and LRBHO lower receivers. (Photo credit: Matador Arms) According to …Turns out the BRN-9 is a Matador Arms product, with some improvements from the Montgo-9. There is now a brass deflector, and there is no screw holding the action together. ... Quite a few pictures and videos of the combo (MAT9 version) being shot on social media, I have a few thousand through the combo. . ARV lower is on the way to …The MAT-9 is a blowback AR-style upper that is compatible with folding buttstocks and LRBHO lower receivers. (Photo credit: Matador Arms) According to Matador Arms, the upper is built with a tapered 4-piece trunnion system made from different materials to keep mechanical accuracy and durability.Aug 26, 2021 · The Montgo-9 upper receiver is made of aluminum, and the bolt and trunnion are 4140 steel for durability. Weight is 3.5lbs with an OAL of 12.125” and a 1.47” width. The Montgo-9 adds to Matador’s 9mm product offering. Matador recently announced their AR-9 80% billet lower receivers, the first run of which is shipping mid-September.\. 13 Jun 2022 ... 1:46 · Go to channel · AimSurplus Product Spotlight: Matador Arms MAT9. AimSurplus•1.7K views · 13:03 · Go to channel · BCA BUFFE...This upper receiver is side-folding compatible and features Matador Arms® patent-pending EZTS™ “Easy Take-down System” with no tools required to break down the upper for maintenance and cleaning. The MAT-9™ is machined for maximum weight reduction, slim profile, and compatibility with bolt catches and lower receivers.Matador Arms MAG-X. Available for Glock ® 17/G19, Sig Sauer ® P320™ & CZ ® 75. The Mag-X allows you to use your pistol magazines in any AR-15 mil-spec lower – the ultimate PCC-pistol combination for Glock ®, Sig ® -P320, & CZ ® 75. Fits any standard AR-15 lower receiver. No modifications are required to your lower or magazine.Installing it is as simple as inserting a magazine. Notice where the Mag-X engages the inserted SIG magazine. (Travis Pike for TTAG) The requirements to use it are simple. You need a 9mm upper and a GLOCK-cut bolt. After that, all you need is a standard AR-15 lower receiver, and a heavy buffer might be a good idea.This upper receiver is side-folding compatible and features Matador Arms® patent-pending EZTS™ “Easy Take-down System” with no tools required to break down …

Lightweight Nitrided Barrel: The MAT9 Upper Receiver comes equipped with a 4150 Lightweight Nitrided Barrel measuring 7.825″ in length, featuring a 1:10 twist and 1/2×28 threads. This combination ensures exceptional accuracy, while the lightweight feature reduces overall weight for improved maneuverability. 8.

Jan 10, 2023 · This upper receiver is side-folding compatible and features Matador Arms® patent-pending EZTS™ “Easy Take-down System” with no tools required to break down the upper for maintenance and cleaning. The MAT-9™ is machined for maximum weight reduction, slim profile, and compatibility with bolt catches and lower receivers. brn-9, matador arms and mean arms endo mag availableat brownells with my exclusive followers code use discount code "tc10" for 10% off orders over $150here h...We take a first look at the Matador Arms MAT-9 AR9 upper receiver that works with virtually all popular magazines 🇺🇸Nine Line Apparel shirts: (discount cod...10 Jan 2023 ... The MAT-9™ is machined for maximum weight reduction, slim profile, and compatibility with bolt catches and lower receivers. The upper is also ... 6061-T6 anodized upper receiver. 4150 Lightweight Nitrided Barrel, 7.825” long, 1:10 twist, 1/2×28 threads. NATO 1913 Spec top rail. 3 Mlok slots (both sides, bottom) Compatible with LRBHO (Last Round Bolt Hold Open) lower receiver. Ready to run with a Suppressor right out of the box! The MAT-9™ 9mm upper is machined for maximum weight ... Colts are king and always will be. ... SD hand-guard looks and feels fantastic on our mat9. ... best etched reticle. This build bangs.Matador Arms MAT9 9mm Complete Upper - BLACK. <p>This upper receiver is side-folding compatible and features Matador Arms® patent-pending EZTS&nbsp;“Easy Take-down System” with no tools required to break down the upper for maintenance and cleaning. The 9mm upper is machined for maximum weight reduction, slim profile, and compatibility with ...2 days ago · Description. Matador Arms MAT-9 Upper Receiver Assembly - Gen2, Black. SPECIFICATIONS: Brand: Matador Arms Model: Montgo-9 Upper Receiver Assembly - Gen2, Black Platform: AR-9 Material: 6061-T6 Style: Mil-Spec Caliber Compatibility: Standard Rifle Upper Section: Picatinny Rail Finish: Anodized Looking for a Coupon …

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Matador Arms, San Antonio, TX. 3,555 likes · 31 talking about this. Matador Arms manufactures new and exciting firearms accessories for the North American market.Upper Assembly Option *. Unassembled Assembled (+$19.99) Quantity. Add to Cart. Description. Matador Arms Montgo-9 Complete 9mm Upper. The Matador Arms Montgo-9 Complete 9mm Upper fits most AR-15/AR-9 Lowers. This upper features a 5.5-inch barrel crafted from 4140 steel with a black nitride finish. The billet aluminum upper receiver is …Description. Solid aluminum. Retains zero. Deflects Brass, protects optics. Easy 5-minute install. The Full-Length SKS Optics Rail is a solid aluminum optic mount that retains zero, deflects brass, protects optics, and accepts any Picatinny bases.Matador Arms MAT-9 5″ 9mm Upper Receiver. Add a review. $ 520.00. Out of stock. SKU: MAT9K-5-UR Category: Complete Upper Receivers. Description. Our compact MAT-9 just got smaller with the release of our MAT-9K variants. A five inch barrel reduces its profile for even tighter spaces.January 21, 2023. 15. Matador Arms makes my favorite AR to PCC adapter. It’s a mag block that fits into a mil-spec magwell and allows me to use CZ 75 magazines in my AR. That’s what I knew Matador Arms for, but that was before the MAT-9. The MAT-9 is a AR-9 upper designed to fit any AR 9mm lower and work with any lower parts kit.Matador Arms brought to SHOT Show 2023 their new MAT-9 blowback 9mm upper receiver assembly which is the improved version of the earlier released Montgo-9. Compared to the Montgo-9, MAT-9 has a longer barrel (7.825” vs 5.5″) and forearm yet at an overall weight of 3 lbs, it’s lighter than the Montgo-9 by about 3 oz. Matador Arms would ...Barrel Lengths: 8 inch or 5 inch. Material: 4140 Nitrided steel. Thread Pitch: 1/2X28. Coating: Black Nitride. Barrel Twist Rate: 1:10. Compatibility: Any 9mm ammo including +P. Note: These are not AR9 barrels these are specific to our platform. Note: Barrel nut socket wrench is required for disassembly.Matador Arms – MAT-9 Monolithic Upper. 🔍. SALE! $ 699.99 $ 539.99. 9mm Straight Blowback Upper. Works with almost any 9mm PCC style magazine. Functions normally with stock folded. Works with Bolt Hold Open Latch. JSD Supply AR 15 Combo Comes in 3 lengths, 7.5 10.5 and 16."Just received my MAT-9 Pre-order in the mail and I take my first impressions on functionality and build quality. NON-SHOOTING. Please check out other videos ...From: $ 489.99. Color. Clear. Quantity: Add to cart. Matador Arms MAT-9 Blowback Upper Receiver. Bufferless – Monolithic – Non-Reciprocating. The MAT-9 upper receiver is side-folding compatible and features Matador Arms patent-pending EZTS “Easy Take-down System” with no tools required to break down the upper for maintenance and cleaning.BRN would have been BRN9 but they are sold out everywhere at the moment. Matador Arms MAT9 is the base for that upper (and MAT9K is the same barrel length) and ... ….

This video is a product overview produced by After Action, LLC, a leading commercial photography and video production company in Mesa, AZ, specializing in Fi...The Montgo-9 adds to Matador’s 9mm product offering. Matador recently announced their AR-9 80% billet lower receivers, the first run of which is shipping mid-September. Matador already manufactures the Mag-X, a mag block adapter enabling the use of P320, Glock, M&P, and CZ-75 pistol mags in their AR-15 lowers.Matador Arms MAT-9 Upper. KM3 Solutions SD guard handguard. KM3 Solutions cerakote. Surefire light. NFA C5 Lower. Matador grip. SB tactical brace. KM3 Solutions Cheek riser. 817K subscribers in the guns community.The hammer and disconnect seem to get hung up sometimes. The issue may be resolved now, with about 75 rounds and probably 50 hand cycles. Still, I would not describe the rifle as reliable right out of the box. It was $490 shipped before tax for a complete 9mm Glock mag lower and a complete 16” 9mm BCG/CH upper. 2.The MAT-9K features an uber-short five-inch barrel, and the standard MAT-9 uses an eight-inch barrel. These are straight blowback-operated firearms and use Glock pattern magazines. The setup uses a buffer contained in the upper receiver, and the charging handle is pushed to the front of the gun, where it rides over the top of the barrel.Jan 25, 2024 · The MAT-9K features an uber-short five-inch barrel, and the standard MAT-9 uses an eight-inch barrel. These are straight blowback-operated firearms and use Glock pattern magazines. The setup uses a buffer contained in the upper receiver, and the charging handle is pushed to the front of the gun, where it rides over the top of the barrel. Introducing the complete MAT-9K: Our compact MAT-9 just got smaller with the release of our MAT-9K variants. A five inch barrel reduces its profile for even tighter spaces. This pistol redefines firearm performance with ambidextrous upper and lower receivers, a 1913 rail for customization, and compatibility with Glock magazines. The Last Round Bolt Hold Open (LRBHO) mechanism enhances ...6 Nov 2023 ... Matador arms makes it easy for you to convert your 5.56 AR to a 9mm AR with their parts! check them out at www.matadorarms.com.6061-T6 anodized upper receiver. 4150 Lightweight Nitrided Barrel, 7.825” long, 1:10 twist, 1/2×28 threads. NATO 1913 Spec top rail. 3 Mlok slots (both sides, bottom) Compatible with LRBHO (Last Round Bolt Hold Open) lower receiver. Ready to run with a Suppressor right out of the box! The MAT-9™ 9mm upper is machined for maximum weight ...Matador Arms would like to proudly introduce the MAT-9, the NEXT Generation blowback bufferless and monolithic (self-contained) upper receiver for lower receivers and almost all 9mm magazines. This upper receiver is side-folding compatible and features Matador Arms® patent-pending EZTS Easy Take-down System with no tools required to break … Matador arms mat9, 20 Jul 2023 ... Matador Arms wanted us to introduce the MAT-9 , the NEXT Generation blowback 9mm AR upper receiver that is bufferless and monolithic ..., 12 Jan 2023 ... The Matador Arms MAT-9 is a fully self-contained 9mm upper ready to shoot suppressed that allows you to use your pistol magazines., Johnny G's Review of Matador Arms Mat9 7.825 in 9mm Upper Receiver I was super excited about getting this upper receiver. Unfortunately, it took less than 10 rounds of subsonic 9mm to break the bolt carrier on my first range trip., Thanks Man! Matador Arms Mat9 upper 575 at mmc armory Vortex strikefire 199 MKM Machining Pistol Grip 60 EPC lower set up 250 Supressor was like 999 i think., Oakley sunglasses are known for their superior quality and durability. However, accidents happen, and sometimes the arms of your favorite Oakley sunglasses may need to be replaced...., Jan 25, 2024 · The MAT-9K features an uber-short five-inch barrel, and the standard MAT-9 uses an eight-inch barrel. These are straight blowback-operated firearms and use Glock pattern magazines. The setup uses a buffer contained in the upper receiver, and the charging handle is pushed to the front of the gun, where it rides over the top of the barrel. , The 9mm upper is machined for maximum weight reduction, slim profile, and compatibility with bolt catches and lower receivers. The upper is also built with a tapered multi-material 4-piece trunnion system to maintain mechanical accuracy and durability. SPECIFICATIONS: Brand: Matador Arms. Model: Montgo-9 Upper Receiver Assembly - Gen2, FDE., Are you a passionate quilter who wants to take your craft to the next level? If so, you may have heard about long arm quilting machines. These specialized machines are designed to ..., The MAT-9™ 9mm AR upper is compatible with AR-9 Lower receivers in any double-stack magazine configuration: Glock ®. Sig Sauer ®. Colt® Stick Magazines. HK® MP5™. CZ ® Evo Scorpion™. With an AR-15 Lower Receiver it requires our Mag-X™ magazine conversion kit or equivalent type product such as Endomags. Some Additional Key Features:, Matador Arms Mag-X Glock $ 140.00 Add to cart; Matador Arms Mag-X for P-320 $ 140.00 Add to cart; The Regulator Sale! $ 155.00 Original price was: $155.00. $ 130.00 Current price is: $130.00. Select options; The Sidewinder Sale! $ 155.00 Original price was: $155.00. $ 120.00 Current price is: $120.00. Read more; SKS Full Length Optics Rail $ …, Matador Arms MAT9 9mm Complete Upper - BLACK. <p>This upper receiver is side-folding compatible and features Matador Arms® patent-pending EZTS&nbsp;“Easy Take-down System” with no tools required to break down the upper for maintenance and cleaning. The 9mm upper is machined for maximum weight reduction, slim profile, and compatibility with ..., The Matador Arms Montgo-9 Complete 9mm Upper fits most AR-15/AR-9 Lowers. This upper features a 5.5-inch barrel crafted from 4140 steel with a black nitride finish. The billet aluminum upper receiver is hardcoat anodized to maximize its strength and durability. Features: Solid end receiver does not require a buffer. Hard anodized billet aluminum., Matador Arms, San Antonio, TX. 3,555 likes · 31 talking about this. Matador Arms manufactures new and exciting firearms accessories for the North American market., Description. The MEAN EndoMag® is a magazine insert that converts your Gen 2 or Gen 3 5.56/.223 Magpul PMAG® housing into a 9mm magazine to use with a standard AR lower and 9mm upper of your choosing with a Glock or Colt variant 9mm BCG. Simply pull the guts out of your standard Magpul AR mag, install the ENDOMAG insert, and now you …, Aug 26, 2021 · The Montgo-9 has a total length integral Picatinny rail on top and a 3.5” bottom accessory rail. The Montgo-9 upper receiver is made of aluminum, and the bolt and trunnion are 4140 steel for ... , Are you a passionate quilter who wants to take your craft to the next level? If so, you may have heard about long arm quilting machines. These specialized machines are designed to ..., 13 May 2023 ... Our MAT-9™ bufferless 9mm upper receiver lets customers build their own unique AR-9 with either a Glock®, SIG Sauer®, CZ® Scorpion, ..., 6 Nov 2023 ... Matador arms makes it easy for you to convert your 5.56 AR to a 9mm AR with their parts! check them out at www.matadorarms.com., 4150 Lightweight Nitrided Barrel, 7.825” long, 1:10 twist, 1/2×28 threads. NATO 1913 Spec top rail. 3 Mlok slots (both sides, bottom) Compatible with LRBHO (Last Round Bolt Hold Open) lower receiver. Ready to run with a Suppressor right out of the box! Matador Arms the MAT-9™ , the NEXT Generation blowback 9mm AR upper receiver that is ... , Matador Arms Mag-X Glock $ 140.00 Add to cart; Matador Arms Mag-X for P-320 $ 140.00 Add to cart; The Regulator Sale! $ 155.00 Original price was: $155.00. $ 130.00 Current price is: $130.00. Select options; The Sidewinder Sale! $ 155.00 Original price was: $155.00. $ 120.00 Current price is: $120.00. Read more; SKS Full Length Optics Rail $ …, The MAT-9 is a blowback AR-style upper that is compatible with folding buttstocks and LRBHO lower receivers. (Photo credit: Matador Arms) According to …, The upper is also built with a tapered multi-material 4-piece trunnion system to maintain mechanical accuracy and durability. The MAT-9™ 9mm AR upper can be configured in two distinct ways: Native Mode: Adaptable to the AR-9 Lower Receivers that are compatible with the following double-stack 9mm magazines: Glock ®. Sig Sauer ®. , Matador Arms brought to SHOT Show 2023 their new MAT-9 blowback 9mm upper receiver assembly which is the improved version of the earlier released Montgo-9. Compared to the Montgo-9, MAT-9 has a longer barrel (7.825” vs 5.5″) and forearm yet at an overall weight of 3 lbs, it’s lighter than the Montgo-9 by about 3 oz. Matador Arms @ TFB:, You can get shingles on your arm. According to WebMD, a shingles rash can show up anywhere on the body; however, the rash will only appear on one side of the body (the left or the ..., Call: 707-416-8847 Email: [email protected]. Address: 10564 Sentinel Drive San Antonio, Texas 78217. Please select your product, Build list: -Matador Arms MAT9 upper -KAK type 42 flash hider -HB industries locking charging block -HB industries folding charging handle -LMD PAiL -PA 1x micro prism cyclops -PSA stealth lower -KAK colt mag adapter -KNS pic rail adapter -mid west industries folding beam stock -Amazon chicom special sba3 -griffin armament A3 pistol grip ..., Description. Solid aluminum. Retains zero. Deflects Brass, protects optics. Easy 5-minute install. The Full-Length SKS Optics Rail is a solid aluminum optic mount that retains zero, deflects brass, protects optics, and accepts any Picatinny bases., 6061 Machined extended handguard. 4140 Barrel extension with 3-lug and 1/2-28 barrel thread. TRIAD DISCLAIMER. The TRIAD is a Modular Bullpup Chassis, designed to house a standard Mil-spec AR receiver. It also uses a bufferless upper receiver. Once the Mil-spec receiver is installed, the upper receiver simply quick-pins in place just like a ... , The 9mm upper is machined for maximum weight reduction, slim profile, and compatibility with bolt catches and lower receivers. The upper is also built with a tapered multi-material 4-piece trunnion system to maintain mechanical accuracy and durability. The MAT-9™ 9mm AR upper is compatible with AR-9 Lower receivers in any double-stack ..., Description. The MAT-9 upper receiver is side-folding compatible and features Matador Arms patent-pending EZTS “Easy Take-down System” with no tools required to break down the upper for maintenance and cleaning. The 9mm upper is machined for maximum weight reduction, slim profile, and compatibility with bolt catches and lower receivers. The ..., The 9mm upper is machined for maximum weight reduction, slim profile, and compatibility with bolt catches and lower receivers. The upper is also built with a tapered multi-material 4-piece trunnion system to maintain mechanical accuracy and durability. The MAT-9™ 9mm AR upper is compatible with AR-9 Lower receivers in any double-stack ..., The Montgo-9 has a total length integral Picatinny rail on top and a 3.5” bottom accessory rail. The Montgo-9 upper receiver is made of aluminum, and the bolt and trunnion are 4140 steel for ..., The upper is also built with a tapered multi-material 4-piece trunnion system to maintain mechanical accuracy and durability. The MAT-9™ 9mm AR upper can be configured in two distinct ways: Native Mode: Adaptable to the AR-9 Lower Receivers that are compatible with the following double-stack 9mm magazines: Glock ®. Sig Sauer ®.