Product Description
Brn-4 10.4'' Barrel Heavy Profile 1-7 1/2-28''Cartridge : AKK_5.56 x 45
Contour : Heavy
Finish : Black Nitride
Gas System Length : 416
Length : 10.4''
Make : Brownells
Make : Heckler & Koch
Make/Model : Brownells|BRN-4
Model : BRN-4
Muzzle Threads : 1/2-28
Twist : 1-7