thx1971 1 Posted February 20, 2017 Report Share Posted February 20, 2017 Ive owned my S-12 since 2009 and its had about 700 rounds through it since new . What causes those wear marks and does anyone else have them? I was wondering if the recoil spring guide is sloppy causing the charging handle to float around ...I dont know. Its always shot fine but the wear seems kind of excessive . Quote Link to post Share on other sites
pedal2alloy 206 Posted February 21, 2017 Report Share Posted February 21, 2017 It is just sloppy tolerances. Some (yours) are worse than others. If it is working, I wouldn't worry about it. So these surfaces are colliding with each other, and there is not much you can do. You could polish those points so that they bypass with less impact. But wait and see if someone with more expertise chimes in case that is a bad idea for some reason. 1 Quote Link to post Share on other sites
evlblkwpnz 3,418 Posted February 21, 2017 Report Share Posted February 21, 2017 I have never seen it quite that drastic. Is it sticking or binding before the bolt locks? With no ammo in it and no mag, when you look through the magwell while the bolt is traveling forward slowly during hand cycling does the bolt deflect before lockup? Quote Link to post Share on other sites
thx1971 1 Posted February 21, 2017 Author Report Share Posted February 21, 2017 I have never seen it quite that drastic. Is it sticking or binding before the bolt locks? With no ammo in it and no mag, when you look through the magwell while the bolt is traveling forward slowly during hand cycling does the bolt deflect before lockup? No everything seems smooth it doesent jam of any sorts . 1 Quote Link to post Share on other sites
evlblkwpnz 3,418 Posted February 22, 2017 Report Share Posted February 22, 2017 If that is the case then keep on keeping on 1 Quote Link to post Share on other sites
G O B 3,516 Posted February 22, 2017 Report Share Posted February 22, 2017 Is the op rod REALLY REALLY loose on the bolt carrier? It is hitting and bouncing, either something is moving slightly askew, or there is a resonance somewhere that is causing the bolt to move around and not go true. Could be anywhere, but the extractor claw is another good place to look. It could be off square, or otherwise deflecting the bolt. 1 Quote Link to post Share on other sites
thx1971 1 Posted February 24, 2017 Author Report Share Posted February 24, 2017 Is the op rod REALLY REALLY loose on the bolt carrier? It is hitting and bouncing, either something is moving slightly askew, or there is a resonance somewhere that is causing the bolt to move around and not go true. Could be anywhere, but the extractor claw is another good place to look. It could be off square, or otherwise deflecting the bolt. Ill check out the op rod I never gave it much thought if it was loose .Thanks Quote Link to post Share on other sites
evlblkwpnz 3,418 Posted February 24, 2017 Report Share Posted February 24, 2017 Is the op rod REALLY REALLY loose on the bolt carrier? It is hitting and bouncing, either something is moving slightly askew, or there is a resonance somewhere that is causing the bolt to move around and not go true. Could be anywhere, but the extractor claw is another good place to look. It could be off square, or otherwise deflecting the bolt. Ill check out the op rod I never gave it much thought if it was loose .Thanks Look for cracking where the op rod threads in. Quote Link to post Share on other sites
G O B 3,516 Posted February 25, 2017 Report Share Posted February 25, 2017 Also look at the bolt, sometimes the pins will 'migrate' a bit. If it protrudes, it can cause all kinds of mischief! Quote Link to post Share on other sites
thx1971 1 Posted February 27, 2017 Author Report Share Posted February 27, 2017 This thing has functioned flawlessly I guess those marks have been there for quite sometime I just never really noticed them till a few days ago. Quote Link to post Share on other sites
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