Do not buy this - but optics planet is great - Strike Industries Gen4 Magwell for Glock

WARNING: TL;DR: THIS IS PIECE OF TRASH DO NOT BUY. I bought this for my Gen 5 Glock 19, no backstraps. No matter how I tried to attach it, the magwell would not stay on the gun even while lightly gripping. Can't imagine using it while inserting a mag or firing the gun. Total junk. I mistakenly used the INCLUDED hex key and instead of tightening it down it ripped the female steel mount out of the magwell and damaged the glock grip. STRIKE SHOULD NOT INCLUDE A HEX KEY IF USING IT DESTROYS THE MAGWELL AND THE GUN'S FACTORY HOLE. I am careful when using this kind of thing with guns especially polymer but it didn't matter. I thought a polymer magwell would be fine because I had great success with Magpuls with my Gen 3s and 4, but this is not even close to that. Total trash, should have gotten aluminum. SAVE YOUR MONEY AND GET A QUALITY MAGWELL, ANYTHING BESIDES THIS. This is not a shot at optics planet, never had a problem with them but this is a WARNING for anyone who would buy this piece of junk.