Ive never shot the PTR's, I did own a couple of HK91's. I cant imagine they'd be all that much different.I had a full length 18" barrel PTR-91 and it was somewhere between unpleasant and miserable to shoot from a recoil and blast perspective.
Depending on the trigger pack, it could be very easy to some moderate work. The only other thing you would need, would be a G3 bolt carrier.I wonder what it would take to make it run full auto with a Fleming sear? Would it be an easy conversion?
They probably figure anyone honest who can afford a HK isn't someone to worry about, and anyone dishonest who can afford one would probably just pick up a real full auto on the black market.One thing I never understood with the HK's was, why the ATF didnt ban them all like they did the open bolt semis. They are probably easier than anything else to convert to full auto.
Those HK SBRs look awesome, but doesn't it basically give you about the same power as a 7.62x39, with a tremendous amount of muzzle blast?