Unless he borrowed the gun from a guy who put a burst fire control group in it! :eek:
Hey, my Oly “cast” plinker receivers have great finish 
Bubbles, rough finishing, etc make them each unique.
ps: I only bought some of them since they were like $60 or $62 a piece and are put in my mess around pile for testing stuff with or in case of another ban etc… So far they have been sitting unused for like 4 years