AR-15 Parts

The Knight's Armament Rib Rail Panel (KAC PN: 95047) is KAC's ribbed polymer rail panel for covering unused slots on KAC RAS (Rail Adapter System) Picatinny quad-rail handguards. The rib design...

The Knight's Armament Free Float Rifle RAS (KAC PN: 21318) is KAC's free-float Rifle-length Rail Adapter System for AR-15/M16 pattern rifles. The KAC RAS (Rail Adapter System) provides full-length...

The Knight's Armament M-LOK Index Stop (KAC PN: 113886) is KAC's precision-machined M-LOK index stop for use on M-LOK compatible handguards, primarily the KAC URX 4 series. The index stop provides a...

LMT Defense kept the AR builders in mind with this essential kit for your next project. The LM556BTK is ready to install in your stripped lower. Kit ships with a dry film lubed, Mil-Spec 6 position...

Full Auto Bolt Carrier Group, 5.56×45 (.223) The L7D3 is the perfect BCG for a Mil-Spec build or upgrade from sub-par equipment. LMT Defense has made the full-auto M16/M4 BCG and its components for...

This is a new Lewis Machine & Tool 14.5-inch MRP barrel chambered for .223/5.56mm. It features a 1/2x28 threaded A2 birdcage flash hider, low profile gas block with a mid-length straight gas tube,...

12″ Piston Chrome Lined 5.56×45 (.223) 1:7″ RH twist barrel Designed for the LMT monolithic receiver, this barrel utilizes a piston operating rod and has an A2 birdcage for reduced flash. The barrel...

The Knight's Armament Barrel Extension Action Wrench (KAC PN: 30447) is KAC's purpose-designed action wrench for removing and installing barrel extensions on SR-15, SR-25, and other KAC platforms...

The VLTOR RE-A5 7-Position A5 Receiver Extension is the buffer tube component of VLTOR's innovative A5 system, designed for use with VLTOR's A5 buffer and spring for improved cycling characteristics...

The LMT Defense M203 Barrel 9" (LMP380) is a 40mm grenade launcher barrel assembly — NSN: 1010-01-611-3461. This 9-inch M203 barrel is compatible with LMT's Classic M203 Receiver (LMP300E) and Rail...

The Knight's Armament 4-Rib Rail Panel — Black (KAC PN: 97166) is KAC's 4-rib polymer panel for covering unused Picatinny rail slots on KAC RAS and other quad-rail handguards. The 4-rib design covers...

The Knights Armament Company Rail Mounted Anti-Cant Device is a Picatinny rail-mounted bubble level lets you know if the rifle is canted while shooting. This is especially beneficial with long range...