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Discussion Starter · #1 ·
I’m getting Leon’s XM21 in this week and am very interested in utilizing a gas-lock sight for backup iron with a low profile peep at the rear. Is this possible? How tall is the gas lock sight compared to the receiver picatinny? Any insight on this would be appreciated!!!

Pic is Leon’s pic I stole from the ad and the other is the possible combo rear/front sight I’m thinking about...



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