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M4 gas pistons making clicking sound.
ShotKlinic posted a topic in BenelliHey new friends.. I noticed a clicking/ clanking sound that I'm pretty sure my m4 didn't make when it was new. I found that both pistons were the cause of it. Basically when I tilt the shotgun forward and back the pistons will slide and I'll hear the metal on metal click of the piston when it slides forward. Is it normal and I'm putting myself through undue worry or should I be concerned? thanks!