wintwu Posted February 22, 2007 Share Posted February 22, 2007 I just got my new M4 assembled it and was cycling some rounds. I noticed when the shell release lever (part #076J) is down showing the red circle, when I pull the bolt head open all the way back it just hangs there like it's stuck. I have to push on the bolt handle forward to get it to close again. Is this normal? or is there something that needs lubing or breaking in so it doesn't hang up like this? thanks. Quote Link to comment Share on other sites More sharing options...
wintwu Posted February 22, 2007 Author Share Posted February 22, 2007 I spoke to Customer Service. they said i should clean the heavy grease and break in with 100 rounds. They said that when the m4 is fully loaded with one in the chamber the bolt carrier shoudln't get stuck open when you rack it back. Anyone else have this issue? Quote Link to comment Share on other sites More sharing options...
M1014 Posted February 22, 2007 Share Posted February 22, 2007 well,,its a brand new gun,,clean it up,,get it to the range and then start a decent evaluation,,,you seem to be looking at something that just may not be,,,, Quote Link to comment Share on other sites More sharing options...
AFPJ Posted February 24, 2007 Share Posted February 24, 2007 wintwu, I recall experiencing that when I first got the M4 and tried to cycle dummy rounds. Somewhere between 1 and 2 boxes of standard field loads cured it. I doubt you have anything to be concerned about. I've noticed people have had to shoot alot more than I did to 'break in' the M4, but mine was a store display and may have been manually cycled a bit. Quote Link to comment Share on other sites More sharing options...
cseabass Posted February 27, 2007 Share Posted February 27, 2007 mine still does it after about 2000 rounds, its gotten rarer but it still occurs. only with light loads though. im not too worried about it, if it still does it in another 1000 rounds(ill probly pass that in a month or so, then ill call up CS. Quote Link to comment Share on other sites More sharing options...
wintwu Posted March 21, 2007 Author Share Posted March 21, 2007 After about 100 rounds it still happens when i bull the bolt back manually. during the 100 rounds it hung up during shooting 1 time. does replacing the recoil spring in the stock help? it seems like the boalt carrier doesnt' have enough force and gets caught up on the breech bolt latch (#019J). Quote Link to comment Share on other sites More sharing options...
Thunderbolt Posted March 21, 2007 Share Posted March 21, 2007 Don't ride the bolt forward. Pull back and let it snap forward on its own. Quote Link to comment Share on other sites More sharing options...
wingbone Posted March 22, 2007 Share Posted March 22, 2007 Don't ride the bolt forward. Pull back and let it snap forward on its own. I agree lots of people ride the bolt forward~nodZ~ Quote Link to comment Share on other sites More sharing options...
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