The Sylvan Arms 9mm Glock Conversion Block converts your AR-15 lower to a 9mm lower that accepts Glock magazines. This Glock AR-15 to AR-9 conversion block is designed to function with standard mil-spec and non-mil-spec lowers when combined with a 9mm upper and Glock style BCG.
check it out https://youtu.be/QJ-QSutw3o4
- Works with Glock 17 and Glock 19 magazines
- Manufactured with 60601 Aerospace Aluminum
- Designed, built, and assembled in the USA