spiker Posted August 14, 2018 Share Posted August 14, 2018 Well have a question for the masses. I just bought my m4 and was pretty excited. I read the manual and watched videos to make sure that I assembled the shotgun right and then went out to shoot it. First five shots out of the shotgun and the end cap came loose and barrel started to come off. I checked everything made sure it was tight and have now discovered that the magazine tube extension piece that comes factory is moving allowing the whole assembly to loosen. I have tightened everything and have found that even with racking the bolt it jars the tube loose at the seam where the small piece threads onto it. It doesn't look like its "unscrewing" it appears to be jumping over the threads with the shock of the bolt slamming forward. Has anybody else had this happen? I have ordered a full length magazine tube in hopes that it will solve this issue. Quote Link to comment Share on other sites More sharing options...
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.