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This is a Lewis Machine & Tool M4/M16 style 14.5-inch .223/5.56mm barrel assembly. It features 1/2x28 muzzle threads, a pinned flat-top height front sight gas block, carbine-length gas system, delta-ring handguard retainer, GI barrel nut, and a...

This is a Lewis Machine & Tool M4/M16 style 10.5-inch .223/5.56mm barrel assembly. It features 1/2x28 muzzle threads, a pinned flat-top height front sight gas block, delta-ring handguard retainer, GI barrel nut, and a chrome-lined bore with a 1:7...

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 is coated and cryogenically treated...

16″ Stainless Steel 5.56×45 (.223) 1:7.5″ RH 5R cut barrel Designed for the LMT monolithic receiver, this barrel utilizes a low profile gas block, mid length straight gas tube, and A2 birdcage for reduced flash. The barrel is...

This is a new Lewis Machine & Tool 20-inch stainless-steel MRP barrel chambered for .223/5.56mm. It features a 1/2x28 threaded A2 birdcage flash hider, low profile gas block with a rifle-length straight gas tube, and 5R cut rifling with a 1:7.5 right...

20″ Chrome Lined 5.56×45 (.223) 1:7″ RH twist barrel Designed for the LMT monolithic receiver, this barrel utilizes a low profile gas block, rifle length straight gas tube, and A2 birdcage for reduced flash. The barrel is coated...

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, and a chrome-lined bore with a 1:7 right hand twist...

This is a new Lewis Machine & Tool 12.5-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, and a chrome-lined bore with a 1:7 right hand twist...

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...