Put this zenitco rail on my Lads 105 but for the life of me I can't get the gas tubes locking pin to rotate and lock in place, it was a little tight to get the pin to move initially but going back is a solid no! Am I missing something 🤔 I've lightly oiled both parts but nowp it won't budge! Other than beating the shit out of it with a lump 🔨 I am at a loss! On the up side that rail looks the dogs😁