[ARCHIVED THREAD] - Rail installation

Posted: 9/20/2013 2:05:50 PM EDT

I have a MI-15 rail I am trying to install on my latest build. I have tried twice and can't get it to stay lined up, which makes the sights way off. Any suggestions on a tool or method to keep in straight.

Posted: 9/20/2013 2:44:05 PM EDT

[#1]

Try aligning the upper and rail using a mount or vfg/afg. I mount an acog between the two and tighten.

Posted: 9/21/2013 2:05:58 PM EDT

[#2]

Quote History

Quoted:
Try aligning the upper and rail using a mount or vfg/afg. I mount an acog between the two and tighten.

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Posted: 9/21/2013 3:12:28 PM EDT

[#3]

I tried using a carry handle the second time. Still clocked a little, maybe I just need a second pair of eyes.

Posted: 9/21/2013 4:22:29 PM EDT

[#4]

Maybe try laying it upside down on a flat surface and tightening it up? It might keep it from twisting.

Posted: 9/21/2013 8:40:33 PM EDT

[#5]

Just got through aligning a cheapie quad rail on my .300blk. I clamped the upper in the panther claw and used a square to align it with the rail. Only thing that would work.

Posted: 9/22/2013 4:23:10 AM EDT

[#6]

the barrel nut may be a HAIR off from being exact. I had that happen on a G1 MI rail. I took a large breaker par and my PRI wrench and just tightened the barrel nut till the wrench was straight up at 12:00 and it solved the problem. seriously like 1/64 of a turn, if even LOL. that anti-rotation pin can pull it out of line if the barrel nut isn't perfect.

[ARCHIVED THREAD] - Rail installation

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[ARCHIVED THREAD] - Rail installation

[ARCHIVED THREAD] - Rail installation