Confirm Action

Are you sure you wish to do this?

Confirm Cancel
Member Login
Site Notices
10/20/2017 1:01:18 AM
9/22/2017 12:11:25 AM
Posted: 8/3/2005 11:35:47 AM EDT
I am doing a complete build up. I finished the complete lower and then tried to mount the stripped upper for the heck of it. It didnt want to fit, nor did a factory Bushmaster I tried. They both mount in the front pin but will not close all the way. I think either the rear upper lug needs to be filed down or the inside of the lower needs to be filed. Any suggestions as to which or how to do it? Or am I missing somthing?
Link Posted: 8/3/2005 11:37:33 AM EDT
Its tight, and its no big deal. Push your front pin in first, then tap your rear pin in place. Eventually, after you have fired a bunch of rounds through it, it will be looser. If you file, or modify things now, it will be super loose later.
Link Posted: 8/3/2005 2:43:21 PM EDT
Its real tight. Im not sure I would be able to open it up after... Or are you saying that when you close it, it will wear away what it needs to?
Link Posted: 8/3/2005 3:15:29 PM EDT
You will probably have to tap it together,and tap it back out.

If you want to speed the process up a bit, you can sit and tap the rear pin in and out while watching TV. You can feel it start to loosen up after awhile doing this.

Otherwise, it will loosen up as it is fired.
Link Posted: 8/3/2005 3:57:08 PM EDT
Especally if it's a RockRiver Lower , they are tight at rear take down pin area . Put a little clp on the lug and push it in after first installing the front pin , as was said above .
Link Posted: 8/3/2005 3:58:45 PM EDT
[Last Edit: 8/3/2005 3:59:56 PM EDT by Minuteman419]
My 3 Stags were all tight in the rear pin area.

What brand lower?

ETA: don't mess with fitting the lower to the upper, fit the upper to the lower. IMO.

Link Posted: 8/3/2005 6:02:31 PM EDT
thanks guys I figured it out.. I just opened and closed it alittle at a time about 100 times and it just worked itself in there..
Top Top