12.5" 5.56 NATO Midlength Complete AR-15 Upper with FSB

12.5” 5.56 Mid Length Barrel w/NP3 Barrel Extension

Our 12.5" Mid Length Barrel is designed with a taper profile for better balance and performance. The Chamber area has more mass to support with heat absorption during heavy fire while keeping weight centered to the AR-15. The taper leads to a light front end for better handling and a well-balanced AR-15 even when used with modern accessories such as suppressors, lights and night vision/IR devices. 

• 5.56 NATO
• Mid Length Gas System
• 4150 CrMoV
• 1/8 Twist
• 1/2x28
• .750 Gas Block Journal, Dimpled
• Gas Port Tuned For Supressed or Un-Supressed with Brass Ammunition
• QPQ Nitride Finish
• NP3 M4 Feed Ramp Barrel Extension
• 25.05oz

Super Duty - 5.56 Bolt Carrier Group

To improve gas efficiency, each gas key is hand flattened to true the surface. Furthermore, each carrier has a gasket hand applied between the gas key and the carrier. Gas key is torqued to spec using OCKS (Optimized Carrier Key Screw) and properly staked.

• Full-Auto M16 profile Carrier: 8620 Steel Manganese Phosphate Finish/Hard Chrome Lined For Corrosion Resistance
• Bolt: 158 Carpenter Steel, Shot peened, Individually high pressure/proof tested and individually magnetic particle inspected 
• Extractor: 4340 with Sprinco 5-Coil Heavy Duty Extractor Spring
• Ejector: S7 with Sprinco Enhanced Ejector Spring
• Gas Key: 4130 Hand Flattened To True The Surface With OCKS(Optimized Carrier Key Screw)
• Cam Pin: 4340 Forward Marked For Consistent Orientation To Reduce Wear And Improve Life Of Bolt
• Firing Pin: 8640 Steel With Hard Chrome Plating

Midwest Industries M-LOK Handguard

• 6061 T6
• Type 3 Hard Coat Anodized
• Continuous MIL-STD 1913 Picatinny Top Rail
• Five Integral Anti-Rotation QD Sling Sockets
• M-LOK slots at 3,6 and 9 o'clock
• 9.2 oz

Centurion Arms C4 M-LOK Handguard

• 6061 T6
• Type 3 Hard Coat Anodized
• Continuous MIL-STD 1913 Picatinny Top Rail
• Four Integral Anti-Rotation QD Sling Sockets
• M-LOK slots at 3, 6 and 9 o'clock
• 8.9 oz

Centurion Arms C4 Quad Rail/Handguard

• 6061 T6
• Type 3 Hard Coat Anodized
• Continuous MIL-STD 1913 Spec Rail at 12, 3, 6 and 9 o'clock
• Four Integral Anti-Rotation QD Sling Sockets
• 12.4 oz

5.56 Forged Upper

• Forge Mark From US Forges
• 7075-T6 Type 3 Hard Coat Anodized
• M4 Feedramp

100% Made in USA

All NFA Rules and Regulations Apply