Description
Starts with Luth-AR’s 14.5″ M4 Government Profile with F Marked Front Sight Base, 5.56mm barrel made from 4150 CMV with a 1-9″ twist paired to their A3 Flattop receiver which includes the Luth-AR bolt carrier, charging handle, forward assist and ejection port cover. Upper Specs: 7075-T6 Forging Hard coat anodize Black Bolt Specs: Bolt: Carpenter 158 steel Extractor: 4140 Alloy steel Army Spec Heat Treatment Manganese Phosphate Bolt Carrier Specs: Carrier: 8620 steel Cam pin: 4340 Alloy steel Carrier key: 4130 Alloy steel Army Spec Heat Treatment Manganese Phosphate Barrel Specs: M4 Government Profile 14.5″ w/FSB Barrel Available in 14.5″ 5.56 mm 4150 CMV (not chrome lined) Threaded Barrel — Thread Pitch 1/2 x 28 Gas Block Journal Diameter .750 Gas Tube Length — Carbine 1-9 RH Barrel Twist 6 Lands and Groves M4 Feed Ramp Button Broached Not chrome lined