Originally Posted by
OlongJohnson
The HK45 does have the USPc recoil system. And you could always get material added to the grip, rather than reducing it.
This is what the HK45 basically was. It's the same trigger system as the USP45 with a Pic rail, the USPc recoil system, ambi slide catch levers and a kinda-more-ergo control lever. By which, I'm guessing maybe it doesn't interact with the inside of the thumb as much under recoil? A new sight format that is common to P30/VP and so now well supported in the aftermarket.
I suspect the Spiderman grip (my timing might be off, but I believe the HK45 was the first one) was intended to make the cross section of the grip closer to the 1911, with its smaller front and rear radii and curved scales that everybody seems to love so much - and nobody ever complains about not being flat-sided enough for them to control the recoil.
As noted earlier, this thread has actually made me curious about the grip. It doesn't have the triangular backstrap that I believe is likely the reason people fight to control P30s and have elevation scatter. Todd G was able to get his splits right back where he thought they should be in like a week of working with it. Same trigger mechanism, more normal recoil impulse, Pic rail, more sight options. Could be very good.