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The Range
Gunsmithing & Repairs
ar15 upper issues
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<blockquote data-quote="NightShade" data-source="post: 2708071" data-attributes="member: 29706"><p>I'm not far away, if you want I can come take a look and see what is going on or you can head this way but sounds like there could be something wrong with the roll pin or the forward assist could be rotating when you are driving the pin in. As far as the gas block if it just barely will not fit or is catching look and see if there is a bur inside the block or on the outside of the barrel that needs to be knocked off. As far as the heat cool method it can work but if it's an aluminium block I wouldn't want to go heating it up all that much to make it fit. May be easier to just hit one or the other with a little sand paper as either the barrel or block could be slightly out of tolerance or maybe both, it the barrel is big and the block is slightly small it can make a huge difference. Sometimes the coatings that are applied can get a little thick too and if the tolerance is really tight that could cause a problem.</p><p></p><p>Otherwise you may be able to head over to Safety First in the old Heartland outdoors building and see if one of those guys see anything acting up with it.</p></blockquote><p></p>
[QUOTE="NightShade, post: 2708071, member: 29706"] I'm not far away, if you want I can come take a look and see what is going on or you can head this way but sounds like there could be something wrong with the roll pin or the forward assist could be rotating when you are driving the pin in. As far as the gas block if it just barely will not fit or is catching look and see if there is a bur inside the block or on the outside of the barrel that needs to be knocked off. As far as the heat cool method it can work but if it's an aluminium block I wouldn't want to go heating it up all that much to make it fit. May be easier to just hit one or the other with a little sand paper as either the barrel or block could be slightly out of tolerance or maybe both, it the barrel is big and the block is slightly small it can make a huge difference. Sometimes the coatings that are applied can get a little thick too and if the tolerance is really tight that could cause a problem. Otherwise you may be able to head over to Safety First in the old Heartland outdoors building and see if one of those guys see anything acting up with it. [/QUOTE]
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