I can’t throw ANY shade at a JP. I don’t have one, but have never heard a bad thing. I do however, own a GAP-10 in 6.5CM. It is incredible. I own several KAC’s, including an SR-25, and my bolt gun is an A.I., so that’s the type of rifles I’m used to, to give you a point of comparison.
My GAP is very regularly a .6-.75 moa gun. 5 shot groups, at 100yds. For a large frame gas gun, I feel that is awesome. Not 3 shot groups either. I have run my S&B 3-20 on it, and currently it’s wearing my NF ATACR 4-16 H59. I feel that scope on a gasser can’t be beat. My bolt has the 5-25 ATACR H59, so my reticle is the same between platforms.
I have nothing but praise for the way George and his folks build rifles. They have some magic dust that makes those Bartlein barrels shoot! Adjustable gas block makes it shoot with or without my can just awesome.
I’ll be glad to answer any questions about the GAP-10. Ive had mine about 2 years. VERY easy large frame semi auto to shoot, and shoot well.