Matador Arms MAT-9K Roller Delayed Upper Receiver, 6061-T6 Anodized, 5" Threaded Barrel, Non-Reciprocating Charging Handle, Fits AR-9 Lower Recievers, Black

The MAT-9K upper is a roller delayed buffer-less, side charging, non-reciprocating 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 upper is also built with a tapered multi-material 4-piece trunnion system to maintain mechanical accuracy and durability. The MAT-9K™ 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 the Matador Arms Mag-X magazine conversion kit or equivalent type product such as Endomag with ejector The Roller Delayed system designed for the MAT-9K upper reduces recoil, lightens the upper and increases reliability. The lack of a need for buffer tubes increases agility and portability in compact spaces. The flexibility of the non-reciprocating and reversible charging handle makes the MAT-9 the perfect platform for any shooter. Veteran Owned and Operated, Made in America