Scout_21 Posted April 29, 2014 Share Posted April 29, 2014 (edited) Hey everyone, So I've put around 500-700 rounds through my m4 (mostly slugs) I'm just curious if the receiver wear from the bolt carrier group I'm seeing is normal or if something is badly aligned. Any advice would be appreciated. http://imgur.com/rWRzVSD http://imgur.com/fNdyUBl http://imgur.com/zrIn3Pd The second link is probably the best. I'm talking about the center guide/ramp/??? where a bevel has been formed from the bolt carrier group. *EDIT* Actually I think it's from the barrel as the bolt carrier group doesn't move that far forward....maybe I take my gun apart too much Edited April 29, 2014 by Scout_21 clarification Quote Link to comment Share on other sites More sharing options...
WrenchBender Posted April 29, 2014 Share Posted April 29, 2014 With the lighting and the grease/oil in place, it is a bit hard to tell. Quote Link to comment Share on other sites More sharing options...
Scout_21 Posted April 30, 2014 Author Share Posted April 30, 2014 (edited) Yeah...sorry for the potato quality pictures. Here are some that are a bit better http://i.imgur.com/TDvSYdj.jpg?2 http://i.imgur.com/f8xTBBg.jpg?2 http://i.imgur.com/TDvSYdj.jpg?2 Edited April 30, 2014 by Scout_21 Quote Link to comment Share on other sites More sharing options...
WrenchBender Posted April 30, 2014 Share Posted April 30, 2014 Nice pics,........ I think that finish wear is indeed from barrel removal/install. would have expected a few others' comments here by now..... Here's a thread from some years ago http://forums.benelliusa.com/showthread.php/16695-M4-receiver-wear-over-time Quote Link to comment Share on other sites More sharing options...
Scout_21 Posted April 30, 2014 Author Share Posted April 30, 2014 Thanks. Yeah....I realized my mistake on what was causing the wear a bit after my post. Hopefully it settles down as the beveling of the receiver appears similar to Dugan's much more used shotgun. Cheers Quote Link to comment Share on other sites More sharing options...
BLACK Posted April 30, 2014 Share Posted April 30, 2014 Yes, contact parts will wear with use, reaching equilibrium. In other words they will wear smooth at which point the wear will slow significantly. Quote Link to comment Share on other sites More sharing options...
Unobtanium Posted May 2, 2014 Share Posted May 2, 2014 Typical. Wear forms here due to harmonics from the barrel during normal firing sequence. It will stabilize and be a non-issue. Quote Link to comment Share on other sites More sharing options...
Scout_21 Posted May 2, 2014 Author Share Posted May 2, 2014 Thanks for the confirmation and clarification. I suspected as such as I don't ram the barrel down into the receiver. Still working on my ejection port beveling like StrangerDangers though Quote Link to comment Share on other sites More sharing options...
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