slobbergoat Posted August 16, 2022 Share Posted August 16, 2022 While cleaning my m4, I noticed that there seems to be a pair of stamped 'alignment marks' or something of that nature where the barrel is mated to the breach piece - they're not entirely aligned being off by about half a millimeter. Can post a photo if that's any help. Looking online, most removed barrel assemblies don't seem to have these marks at all. Is this anything to concern myself about? I spent a while staring at them but can't seem to see any noticeable misalignment with the front sight or so on that'd suggest that the barrel has been pressed on crooked. Quote Link to comment Share on other sites More sharing options...
RxArms Posted August 16, 2022 Share Posted August 16, 2022 Pics will help Quote Link to comment Share on other sites More sharing options...
slobbergoat Posted August 16, 2022 Author Share Posted August 16, 2022 You can see the tab here. Checked the gas pistons, their clearances seem to be equal, certainly not off as much as the marks are. Is this maybe a drift mark to friction weld the two surfaces and not an alignment mark at all? It looks like they have been punched rather than cut into the surfaces. Quote Link to comment Share on other sites More sharing options...
Unobtanium Posted August 16, 2022 Share Posted August 16, 2022 This is fine. I have never seen them align on any of mine. I do not understand their purpose to be honest, given this. Quote Link to comment Share on other sites More sharing options...
Ben elLes Posted August 16, 2022 Share Posted August 16, 2022 7 hours ago, Unobtanium said: This is fine. I have never seen them align on any of mine. I do not understand their purpose to be honest, given this. Perhaps their purpose is to make sure they’re slightly unaligned then. 😀 Quote Link to comment Share on other sites More sharing options...
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