test/function check question for M4 GBBR
picked up a M4 and just wanted to check if everything is working perfectly as it's second hand.
these are the steps that I've done:
-with the gun in semi, charge the gun
-squeeze and HOLD the trigger. hammer falls.
-with the gun in semi, charge the gun again while still squeezing trigger. hammer does not fall
-attempt to move selector to the safe position while still squeezing trigger. the selector does not move to the safe position. hammer does not fall
-attempt to move selector to the full-auto position while still squeezing trigger. the selector moves to the full-auto position and the hammer falls
can anyone tell me if there is something wrong internally with the trigger mechanism that allows the selector to move to full-auto and make the hammer fall like that?
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