I really like my small frame URR, and would like to add a large, but it is kind of hard to determine which guns it will work with, and which it won't.

Specifically, I currently own Armalite and Larue.  I'm wondering if anyone has tried it with those.

On my long term buy list could be Sig 716, DD (I know this one is specifically listed as not compatible) and/or LMT.

Maybe we can get a list going of rifles that are known to work with the large frame URR, and those that are known not to?

The rod works with LR pattern guns as well as the AR-10 pattern that we tested.
The ArmaLite should not be a problem. The OBR is kinda a combo of the two so I believe it will fit, but have not confirmed.
I have not tried a Sig716, but have used it with success with the LMT.
If you buy it from us and it does not fit the gun you bought it for you can always return it.
You may have luck asking in the Armory sub forum.

Thank you,
Pete

Thanks!