This pistol grace for glock gen 4 and other full sized frame models installs into the grip behind the magazine and can be held in place with the included pin.

No support is needed, however this is a large model and it just fits on a 280 x 280 build plate.

STL and STP included.

If someone can test this with other generations of full sized glock, let me know if it fits and I'll update the description.