Replacement AAP nozzle retaining screws by Hadron Airsoft Designs, manufactured in marine grade stainless steel.
Pre-threalocked allen bolts.
Supplied in pairs. (that is 2 screws per order)
Unscrew the black "cheesium" standard screws, and insert these marine grade fixings.
Caution - Do not overtighten.!
0.1 gram heavier than the stock screw.
More reliability for your BRRRRTTT...