Conversion Kits - .40 S&W
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Stern Defense Magazine Conversion Block – for M&P, P320/P250, 9mm, & .40 S&W Magazines
Convert Your Your Lower Assembly To Use 9mm Or .40 S&W P320/P250 and M&P Magazines This Stern Defense Magazine Conversion Block will allow you to convert your mil-spec AR 15,... -
Stern Defense Magazine Conversion Block – for Glock 9mm & .40 S&W Magazines
Convert Your Lower Assembly To Use 9mm and .40 S&W Glock Magazines This Stern Defense Magazine Conversion Block will allow you to convert your mil-spec AR 15, M4, or M16...Only$179.99
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