EDgun any one ever have cap come lose on a ed gun leashy 2

i got my rifle out it would fire 1 round but would not rotat cylender took me a while to find the case a bolt backed out about 3/16 of a gap on back side of part in pict i screwed it back in but do any you guy no if i need to put drop lock tigth on it i think its a air vavle that turnes the mag
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