Olympic Arms K3B-M4-A3-TC

Receiver Material	7075 T6 Aluminum Forged Receivers Machined By Olympic Arms
Receiver Finish	Black Matte Anodized Receivers, Pakerized Steel Parts
Action	Gas Operated Semi-automatic Action
Upper Type	Flat top w/ picatinny rails & detachable carry handle
Front Sight	Elevation adjustable post w/ bayonet lug
Handguard	Free floating FIRSH w/ picatinny rails
Barrel	16" M4, button rifled, 416 stainless steel
Chambering	5.56 NATO
Bore	Long-life non-chromed bore
Twist Rate	1x9
Muzzle	A2 flash suppressor
Stock	M4 fiberite, 6-point collapsible
Length	31.75"
Weight	6.77 lbs

Sometimes called the "alphabet gun".  The A3-TC variant takes the K3B-M4 and adds a detachable carry handle and FIRSH quad rail free floating handguard.