You don't need a handstop to test it, attach a sling and take it to the range. Ar15 pistol grips are just plastic held on with a screw, theyre steong enough, and you shouldn't be torquing the stock that much anyway. Unless you plan to go hand to hand in the pits, it's probably strong enough.That’s a creative solution printing a forend. The website indicated the forearm has a integral Anschutz slot. Interesting. I am a little concerned about rigidity aft of the pistol grip. I have UMRS system and it’s extremely ridgid. Really enjoy shooting it.