Hi: I am new to this thread and this is a very good topic on the loose screw. I have not had the chance to shoot one since I do not have one yet, but I have done a lot of research on this matter. I have talked to two Smith & Wesson cust. ser. personnel and two different answers. One tighten screw then give it a oomph, like a jerk on the allen, the other a little lite lock tite, and the last said there is no fix as of now. Do not let the screw keep you from the purchase. I agree with that. Look at it this way lifetime warranty, and they send you a shipping label. No cost to you as long as its not abuse. So that being said I ordered one good price and should be here in a couple weeks, i'll check it out and then I can give my opinion on it. Seven reasons that I bought it. Name brand, price, stainless, 2 mags, easy tear down, fiber optic sights and warranty.