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AR-STONER 9mm Magazine Adapter Block for the AR-15 platform converts a standard lower to accept 9mm rounds. The block is made from anodized aluminum with a steel insert for the feed ramp and accepts Colt style 9mm magazines. Installation is quick and easy. Use a 1/16 and a 5/64 hex key (not included) on the provided screws to lock down and secure this mag block.
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