AR-15 Parts
Shop our extensive inventory of AR-15 parts and modern sporting rifle (MSR) components. From fully assembled MIL-SPEC upper receivers and enhanced lower parts kits to free-float M-LOK handguards and ambidextrous controls, we carry the critical components required for duty, defense, and custom builds.
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Out of stockOn Sale
LMT Defense - 5.56mm M4/M16 16" AR15 Barrel Assembly - LMP10405
LMT Defense
Now: $401.40Was: $424.80This is a Lewis Machine & Tool M4/M16 style 16-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...Now: $401.40Was: $424.80 -
Out of stockOn Sale
LMT Defense - 5.56mm M4/M16 14.5" AR15 Barrel Assembly - LMP10406
LMT Defense
Now: $401.40Was: $428.40This 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...Now: $401.40Was: $428.40 -
Out of stockOn Sale
LMT Defense - 5.56mm M4/M16 10.5" AR15 Barrel Assembly - LMP10408
LMT Defense
Now: $401.40Was: $451.80This 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...Now: $401.40Was: $451.80 -
LMT Defense - 12" Piston MRP 5.56mm Barrel Assembly - #R-L7MC1B
LMT Defense
$716.8512″ 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...$716.85 -
Out of stockOn Sale
LMT Defense - 5.56mm 16" Stainless Steel MRP Barrel Assembly - L7SB1S
LMT Defense
Now: $803.70Was: $893.0016″ 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...Now: $803.70Was: $893.00 -
Out of stockOn Sale
LMT Defense - 5.56mm 20" Stainless Steel MRP Barrel Assembly - L7SD1S
LMT Defense
Now: $803.70Was: $893.00This 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...Now: $803.70Was: $893.00 -
Out of stockOn Sale
LMT Defense - 5.56mm 20" Chrome Lined MRP Barrel Assembly - L7RA1B
LMT Defense
Now: $538.20Was: $554.4020″ 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...Now: $538.20Was: $554.40 -
Out of stockOn Sale
LMT Defense - 5.56mm 14.5" Chrome Lined MRP Barrel Assembly - L7NE1B
LMT Defense
Now: $538.20Was: $554.40This 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...Now: $538.20Was: $554.40 -
Out of stock
LMT Defense - 5.56mm 12.5" Chrome Lined MRP Barrel Assembly - L7MJ1B
LMT Defense
$554.40This 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...$554.40 -
Out of stockOn Sale
Surefire SOCOM 3 Prong 556 Flash Hider - 1/2x28
Surefire
Now: $152.00Was: $169.00SureFire’s advanced SF3P three-prong flash hiders deliver superior performance with a patented design that greatly reduces muzzle flash — typically more than 99%. Available for use with a variety of rifle calibers and muzzle thread specs,...Now: $152.00Was: $169.00 -
Out of stockOn Sale
LMT Defense - 16" Barreled Upper Receiver .223/5.56mm AR15 - L7UB1
LMT Defense
Now: $685.80Was: $706.50Standard 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...Now: $685.80Was: $706.50 -
Out of stockOn Sale
LMT Defense - 14.5" .223/5.56mm AR15 Upper Receiver - L7D1
LMT Defense
Now: $685.80Was: $706.50LMT 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...Now: $685.80Was: $706.50