AR-15 14.5'' M4 GOVERNMENT UPPER RECEIVER 1-9 BA-F14

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