[ARCHIVED THREAD] - Problems with pistol grip thread

Posted: 10/13/2010 4:18:39 PM EDT

Just started to put together my first lower. RRA with a RRA LPK. Was going awesome and very easy until I went to put on the pistol grip. The screw would only thread a little past halfway into the hole. Thought it might have been the screw, so I took the Magpul grip I had ordered for another AR and tried to install it using the supplied screw, again would only thread a little past halfway.
Is it ok to get a shorter screw to install the grip? I know the screw is a 1/4 28.
I'm just worried about the grip staying secure with a shorter grip screw.
Thanks.

Posted: 10/13/2010 5:15:57 PM EDT

[#1]

Odd, what brand lower is this? You could run a tap through it just to make sure the threads are clean.

Posted: 10/13/2010 5:23:40 PM EDT

[#2]

Rock River lower. I thought of running a tap through it, just want to make sure I don't damage the threads.
I tried both pistol grip screws on a Rguns lower I have, and the screws went in perfect. So maybe the threads do just need to be cleaned up.

Posted: 10/13/2010 6:43:44 PM EDT

[#3]

Is it a MagPul grip your installing?

My MagPul grip had a big 'ol dab of blue loctite on it that created problems (wouldn't screw in past the dab); a few strokes with some 600 grit sandpaper to knock the "excess" off and it screwed in just fine.

Posted: 10/14/2010 6:58:02 AM EDT

[#4]

Thanks for the help guys, I tried cleaning off the locktite on the Magpul screw, still didn't thread all the way in.
So I took the other suggestion and ran a tap through the screw hole and cleaned up the threads. That worked, must have had a burr or something causing the screw to stop.
Thanks everyone for the help. I really appreciate it.

[ARCHIVED THREAD] - Problems with pistol grip thread

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[ARCHIVED THREAD] - Problems with pistol grip thread

[ARCHIVED THREAD] - Problems with pistol grip thread