Receivers & Frames

The Knights Armament SR-15 E3 Mod 2 series' 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 far...

The Knights Armament SR-15 E3 Mod 2 series' 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 far...

The FN SCAR(R) barrel assemblies are cold hammer-forged, chrome-lined MIL-SPEC steel barrels with front sight assembly, gas block assembly, gas regulator, gas piston and flash hider installed. Available in short lengths for reduced weight, fast handling...

The FN SCAR(R) barrel assemblies are cold hammer-forged, chrome-lined MIL-SPEC steel barrels with front sight assembly, gas block assembly, gas regulator, gas piston and flash hider installed. Available in short lengths for reduced weight, fast handling...

The LMT Modular Ambidextrous Rifle System (MARS) lower receiver offers ambidextrous controls to include the selector, magazine release and bolt catch and release. The ambidextrous magazine and bolt catch mechanisms are machined directly into the receiver...

The LMT Defense MARS-L DMR Complete AR15 Lower Receiver (M7DM4) is purpose-built for designated marksman rifle (DMR) configurations. The LMT® Modular Ambidextrous Rifle System (MARS®) lower receiver sets a new standard for ambidextrous AR-15 controls...

The LMT Defense MARS-L PDW Complete AR15 Lower Receiver (M7DA4SH) is a fully assembled, ready-to-build lower receiver featuring LMT's legendary MARS® ambidextrous control system. The LMT® Modular Ambidextrous Rifle System (MARS®) lower receiver sets a...

This stripped AR-15 lower is forged from highly durable 7075 aluminum and has a hardcoat anodized finish. It is fully compatible with Mil-Spec lower parts and made to the exacting tolerances LMT is known for. Forged 7075 aluminum Hardcoat...

Standard flat-top upper receiver with 16″ chrome lined 1:7″ twist 5.56 barrel. Meeting todays military specifications, the L7UB1 is a near equivalent to the upper delivered on the US M4A1 5.56 carbine. The upper receiver itself features...

LMT Defense standard flat-top upper receiver with 14.5″ chrome lined 1:7″ twist 5.56 barrel. Meeting todays military specifications, the L7D1 is a common equivalent to the upper delivered on the US M4A1 5.56 carbine. The upper receiver itself...

LMT Defense standard flat-top upper receiver with 10.5″ chrome lined 1:7″ twist 5.56 barrel. Comes with forward assist, port door, sling swivel, front sight post, and gas tube installed.  Utilizes the mil-spec barrel nut and delta ring...

The LMT Defense MRP-H® Quad Rail (Picatinny) 12.5" AR10/AR308 Upper Receiver (LM308B1) is built around the patented LMT Monolithic Rail Platform (MRP™) engineered for large-caliber platforms. Receiver and handguard machined from a single piece of forged...