SI Defense Barrel AR-15 300 Fireball (7.62x35mm) 16" M4 Contour 1 in 8" Twist Matte
- Length: 16"
- Material: 4140 Chrome Moly Steel
- Contour: M4
- Chamber: 300 AAC Blackout (7.62x35mm)
- Twist Rate: 1 in 8"
- Chrome Lined: No
- Finish: Mil-Spec Heavy Phosphate
- M4 Feed Ramps: Yes
- Muzzle Thread Pattern: 5/8"-24
- Gas Port Location: Carbine
- Exterior Diameter at Gas Port: 0.750"
- Gas port comes set for supersonic ammunition. It may need to be enlarged to fire subsonic ammunition.
The statements and opinions expressed within Customer Reviews reflect each author's personal perspective and do not imply endorsement by MidwayUSA, its Employees or any other organization. Customers should in no way infer that MidwayUSA has validated review information as safe, accurate or appropriate.