STNGR 12.5" 5.56 Complete Upper – Carbine Gas with 13.5" HWK M-LOK Handguard & BCG

Features

12.5" 5.56 NATO barrel with 1:7 twist and midlength gas system
13.5" STNGR HWK free-float M-LOK handguard
Billet upper receiver with forward assist and dust cover installed
Low-profile .750 steel gas block with carbine gas tube
Premium phosphate M16 BCG with 9310 MPI bolt and forged charging handle included
A2 flash hider with crush washer
Compatible with mil-spec AR-15 lower receivers

This STNGR 12.5" complete upper is built for compact AR-15 pistol or SBR configurations where maneuverability matters but you still want solid 5.56 performance. The 12.5" barrel with a carbine gas system offers a smooth recoil impulse compared to shorter gas setups, while the 1:7 twist stabilizes a wide range of common bullet weights. Paired with the 13.5" HWK M-LOK handguard and a full M16-profile BCG, this upper arrives fully assembled and ready to drop onto any standard AR-15 lower. https://youtu.be/BgioBUdg1Ec

Specifications

Brand: STNGR
Model: 12.5" Complete Upper with 13.5" HWK Handguard
Fit: AR-15
Caliber: 5.56 NATO
Barrel Length: 12.5 inches
Twist Rate: 1:7
Gas System: Carbine
Gas Block Diameter: .750
Barrel Material: 4150 Alloy Steel
Barrel Finish: Black Nitride
Handguard Length: 13.5 inches
Handguard Type: Free-float M-LOK
Upper Receiver: Billet, Type III Hardcoat Anodized or Cerakote (depending on variant)
Bolt Carrier Group: M16 profile, 8620 carrier with 9310 MPI bolt, phosphate finish
Charging Handle: Forged AR-15 charging handle
Muzzle Device: A2 Flash Hider (1/2x28) with crush washer
Overall Weight: 3.5 pounds
Finish Options: Type III Hardcoat Anodized or Cerakote

What's Included

1x Billet Upper Receiver (assembled)
1x 12.5" 5.56 NATO Barrel
1x 13.5" STNGR HWK M-LOK Handguard
1x Low-Profile .750 Gas Block
1x Midlength Gas Tube
1x A2 Flash Hider with Crush Washer
1x Premium Phosphate M16 Bolt Carrier Group
1x Forged AR-15 Charging Handle