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The 18" 5.56 NATO barrel assembly has a heavy barrel profile with fluting. It is the same assembly used on our Model 3G rifle. The barrel has a 1/8 twist. It includes all the parts needed to attach it to an upper receiver.
Chamber: 5.56 NATO (The barrel assembly will also shoot .223 ammunition)
Diameter at the gas port: .750"
Barrel Threading: 1/2 x 28
Barrel Profile: Heavy barrel
Barrel Material: 410 Stainless Steel
Twist Rate: 1/8
Bore & Barrel Lining: None
Barrel Coating: None
Sight: Low profile gas block
Handguard: 15" free foat Samson Evolution modular handguard
Gas System: Rifle length direct impingement
Muzzle Device: Stag 3G compensator
Q: Will this work with my upper receiver?
A: The barrel assembly will work with any mil-spec upper receiver. If you have a left hand upper receiver, please make sure to purchase the barrel with an ambi barrel extension to ensure the bolt will properly lock into the barrel extension.
Q: Do you provide instructions on how to install the barrel?
A: Unfortunately we don't provide directions on how to install a barrel and recommend that it be installed by a gunsmith to prevent damage to the rifle.
Q: Do I have to purchase a matched bolt to my barrel?
A: With AR-15's as long as you are using the proper bolt for the caliber you do not need to match a bolt to the barrel.