I was having trouble pinching my finger because of over-travel of the trigger on the R51.  So today I drilled and tapped the trigger guard to accept a 6-40 Allen head set screw.

Works just fine with no more pinched finger.  Also it just might help in the accuracy dept.  Can't wait till spring to find out.  Too cold to shoot around here right now.

OK, now that I have put about 300 rounds through the R 51, I am finding it OK for what it was designed for (personal defense).  When shooting at reasonable PD ranges, IE 30 feet or less, it shoots well enough and has handled just about all ammo except 1 (tulammo) with no failures. 

My main beef is the trigger, It flexes from side to side and is a little spongy (which I probably wouldn't notice in a gun fight) and worst of all, if I don't position my finger with just the tip of it on the trigger, it pinches it between the trigger and the trigger guard.

There seems to be no after market parts for this gun and probably never will be, but if anyone ever offers a replacement trigger for it, I will be a customer.

Does anyone here know the twist rate in the R 51 9MM Pistol?

I recently bought a re-engineered version of the R-51.

I find it quite reliable in terms of feeding, extraction and ejection, but the accuracy is really dismal.

What kind of accuracy are you guys getting from this gun?  My groups are running 4" to 6" at 15 yards.