Upper Receiver

The KAC M4QD Flash Hider is an effective flash suppressor that also serves as a platform for attaching a Knight’s Armament quick detach QDSS-NT4 sound suppressor. Comes complete with a 7-piece shim kit.   Specifications: Weight: 2.4oz...

The Knight's Armament Piston Assembly — USP Tactical M16x1 LH (KAC PN: 22500) is KAC's replacement piston assembly for Heckler & Koch USP Tactical pistols with M16x1 left-hand thread suppressor mounts. This piston component is part of the suppressor...

The Knights Armament SR-25 Precision Carbine Upper Kit was built as a dual role 7.62 NATO Carbine. Every PC is equally adept at putting rounds on target at 1000 meters or rapid multi-shot engagement at close range distances. Featuring our 16” cut...

The Knights Armament SR-25 14.5” Combat Carbine Upper kit is the latest evolution in the lightweight 7.62mm NATO Carbine platform. The 14.5” CC provides 7.62mm NATO performance in a package of comparable weight and size to common lower...

Knight's SR-30 E3 MOD 2 takes advantage of the .300 BLK, offering a 9.5" barrel for a significantly more transportable and maneuverable firearm. The QDC compatible Flash Hider will mount any of the KAC 7.62mm QDC suppressors. The SR-30 has 99% parts...

The SR-15 E3 Mod 2 5.56 mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug bolt design both enhances function and increases bolt life. The 5.56 mm 3-Prong Flash...

The Knight's Armament 5.56mm QDC 3-Prong Flash Suppressor Kit (KAC PN: 30555) is KAC's signature 3-prong flash eliminator for 5.56mm rifles with 1/2"-28 TPI muzzle threading. The KAC 3-Prong Flash Eliminator is an extremely effective flash suppressor...

The SR-15 E3 MOD 2 series’ 5.56mm NATO barrel is manufactured for military grade durability, and is free-floated inside a URX4 M-LOK handguard. An improved E3 round-lug bolt design both enhances function and increases bolt life far beyond the...

LMT Defense Quadrant sight, mounts to a 1913 picatinny rail upper receiver. 

Leaf Sight for Standard M203 Grenade Launcher. Mounts directly to the standard handguard.  

The Lewis Machine and Tool AR-15 bolt carrier is a full auto rated, M16 cut carrier designed for long term durability and reliability. The manganese phosphate carrier is machined out of 8620 Carpenter steel and has been magnetic particle inspect to...

Standard semi auto carrier assembly - carrier only. Does not include the firing pin, cam pin, or firing pin retaining pin. As with all LMT bolts/carriers these are test fired at the factory and will show evidence of such. Weight:0.566 lbs Caliber: ...