Matrix Steel M4 / M16 Airsoft AEG Receiver Locking Pin Set (Hex Screw)

"These are great pins a little expensive but great, they fit in both Classic Army and G&P bodies (probably more but those are the only AR's that ive tested them in) They are threaded and the screws are Allen/hex so they wont fall out like the stock G&P pins can (and did for me, rendering my $800 gun useless) so yeah get these before this happens to your G&P gun.

"I have two G&P M4 for which the lower receive locking pin had worn to the point where they could slip out during play. I found this product hoping it would be a perfect solution… unfortunately it wasn’t. If you over tighten even just a little and the pin itself was ‘free’ to spin in place, you would have a nightmarish time trying to get the pin out. I had to dremel the pin capside to allow for a screwdriver to be inserted such that I could unscrew the cap.
If you were to get this product, do yourself a solid favor and slot the cap end before inserting, otherwise trying to do this inside a AEG risk metal filing everywhere