I just ordered a 3 position frt from Rare Breed. I already have a Parker Mtn trip bar that I have not yet installed on my Sig Rattler (mine is the 5" non-lt earlier version). Does anyone else have an frt in a Sig Rattler? If so, did you have to remove the firing pin safety? did you have to change springs to cure any bolt bounce? i'm trying to decide whether to install my first frt in a CMMG 9mm Banshee or the Sig Rattler. I feel confident I can get the frt to run properly in the CMMG (I have plenty of bolt weights, buffers, AR springs, etc) and am inclined to put it in that one versus the rattler just because I don't want to go to a lot of trouble with the Rattler. Any thoughts?