The gun needs to cycle the bolt just hard enough to reliably eject the spent shell, and feed the next live shell.DuckManClyde wrote:So all this stuff you guys are adding on ( especially the spring mentioned in the 1st page ), is it all necessary? Cause if the gun has lasted 10+ years already w/o that spring then should i really be worried about the whole " ball peen hammer " analogy? Cause that makes me feel like i cant trust it....
Anything more, is just beating the gun up.
And the 390 doesn't have a buffer.
Just because the factory bypass spring allows the gun to cycle any load that you put in the gun, doesn't mean that it's the ideal powered spring for the loads you shoot.