Description
11.5” Government profile Barrel Assy w/F marked FSB and 2 pc Handguard 1-7 Twist
Starts with Luth-AR’s 11.5″ barrel with F Marked Front Sight Base, 5.56 barrel made from 4150 CMV with a 1-7″ twist mated 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:
Government profile 11.5″ w/F marked FSB Barrel
- Available in 11.5″
- 5.56 mm
- 4150 CMV (not chrome lined)
- Threaded Barrel — Thread Pitch 1/2 x 28
- Gas Journal Diameter .750
- Gas Tube Length — Carbine
- 1-7 RH Barrel Twist
- 6 Lands and Groves
- M4 Feed Ramp
- Button Broached
- Not chrome lined
