Sylvan Arms SCB100 AR-15 Lower Receiver 9mm Sig P320 Compatible Magazine Conversion Block

This Sig P320 9mm Conversion Block is genuinely ingenious and one of the best AR-15 accessories on the market today. This 9mm Sig P320 Magazine Conversion Block converts your standard AR-15 lower receiver magazine well to a 9mm Lower, allowing you to use P320 magazines. This conversion kit is designed to fit into the magazine well of your standard AR-15 and reduces all the extra space and allows for use of Sig P320 15rd, 17rd, and 30rd magazines. This is fantastic because it increases the modula