SPECS: Extruded aluminum, anodized, black, matte finish. 2"
(5cm) diameter. Standard; 12-3/8" (31.4cm) long.
Carbine; 7¼" (18.4cm) long. Fits AR-15 rifles or
CAR-15 carbines. Both models accept barrels up to 1" (2.5cm) in
diameter. Check distance from front of receiver to rear of front
sight bridge.