FF rails don't line up with upper receiver [Archive] - Glock Talk


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09-21-2011, 08:43
I installed a UTG FF and after tightening down the nut, the rails are now very slightly misaligned with the upper receiver rails. I mean very slightly, only about 2 degrees (estimate). I am usually a real stickler for details like this, but the only solution I can think of is to buy a dedicated tool that lines these up and it is not worth the time or expense if this is nothing more than an aesthetic issue that can't be noticed unless you view the rifle from the buttstock or barrel end and look for it. Any potential problems that I am missing here?

09-21-2011, 10:30
I'm not hugely familiar with UTG rails. In most cases, you will have to align the barrel nut. Once that barrel nut is torqued in place, then the outer ring can be tightened with lock-tite or similar, and it should be perfectly aligned. If you over tighten the outer ring, you can loosen the barrel nut causing it to come off center.