The mag-well insert for non-threaded back strap holsters a pair of cut checkering areas that ensure the magazine does not inadvertently catch on the back strap upon holstering. This minimizes the possibility of dropping the magazine during a draw. It also allows confident that the magazine will not inadvertently slide off the end of the mag-well during normal use. The magazine-well insert is installed through these areas and then tightened down with the set screw. Due to the extremely low profile design of the mag-well the magazine cannot be inserted until the end of the magazine inserts. Because this is a set screw item installation is necessary. Specifications for Agency Arms Glock Magazine Well for No Back Straps: Manufacturer: Agency Arms Color: Black Package Contents: Agency Arms Glock Magazine Well for No Back Straps