[ARCHIVED THREAD] - RRA Varmint Upper Question

Posted: 8/16/2005 4:55:05 PM EDT

I was wondering if you can install a DD, LaRue or YHM Quad rail on a RRA varmint upper with the bull barrel.

I cannot see why. The FF tube that comes with the upper is the barrel nut, standard thread for all uppers.

I thought I read somewhere you cannot do this, but I just cannot see why.

Any comments?

77Bronc

Posted: 8/16/2005 5:55:09 PM EDT

[#1]

I did it with a YHM lightweight. You have to mod the nut a little.

Posted: 8/17/2005 6:33:45 PM EDT

[#2]

What kind of little mod?
Thanks

Posted: 8/18/2005 2:19:13 PM EDT

[#3]

The RRA FFT should be a one piece tube, meaning the tube itself has the threads in it. All uppers have the same thread I think.

Posted: 8/18/2005 5:41:19 PM EDT

[#4]

Yes, the threads are the same but the nut still won't fit over the RRA bull unless you bore it out a just a nut hair. 2 minutes with the rotary tool of your choice and polish or I think YHM will do it for you for a couple of bucks. The nut is not threaded all the way on the instide. I don't have a picture but you will see when you get the tube.

It was REALLY easy. (Aluminum is very soft)

[ARCHIVED THREAD] - RRA Varmint Upper Question

AR Sponsor

Warning

Confirm Action

[ARCHIVED THREAD] - RRA Varmint Upper Question

[ARCHIVED THREAD] - RRA Varmint Upper Question