Conversion Kit: Sylvan Arms AR-15 9mm Magwell Adapter for Glock Magazines + Magazine, Magpul PMAG 15 GL9, For Glock G19 15 Round Capacity, B
The Model 19-15 Magazine Adapter by Blind Squirrel Enterprises: The first device to successfully adapt 1911 Magazines for use in standard AR-15 Lowers. : r/ForgottenWeapons