Will a barrel with M4 feed ramps work fine on an upper that doesn't have the M4 relief cuts?
I keep reading on different forums that it will, but many manufacturers say on their websites "Because this barrel has M4 feed ramps, it must be used on an upper which has M4 relief cuts".
Seems to me like it should work regardless, but I figured I might as well check here.
I keep reading on different forums that it will, but many manufacturers say on their websites "Because this barrel has M4 feed ramps, it must be used on an upper which has M4 relief cuts".
Seems to me like it should work regardless, but I figured I might as well check here.