Q Light Profile Barrel Assembly 5.56x45mm NATO 1-7 Twist 12in. COMMON FEATURES & SPECS MATERIAL: Stainless Steel 416R RIFLING: Single Point Cut Rifling MUZZLE: 1/2-28 Tapered Muzzle FINISH: Bead Blasted Matte Finish Specifications for Q Mini Fix 5.56 NATO Barrel Assembly: Manufacturer: Q Caliber: 5.56x45mm NATO Projectile Caliber: .224 Caliber Barrel Twist Rate: 1-7 Gun Make: Q Gun Model: Q The Fix Last Chance: Yes Package Contents: Q Mini Fix 5.56 NATO Barrel Assembly What firearm models does the manufacturer say Q Mini Fix 5.56 NATO Barrel Assembly is compatible with? The manufacturer says that Q Mini Fix 5.56 NATO Barrel Assembly is compatible with Q The FixQ ACC-MNF-BRL-5.56-12: Light Profile Barrel Assembly 5.56x45mm NATO 1-7 Twist 12in