The opening at the base with the hollow backstrap is equipped having a detachable polymer plug that also provides a lanyard loop. Although the G19X will settle for Gen3, Gen4 and Gen5 G17 factory magazines, the changes across the magazine nicely are not appropriate with some aftermarket versions and updates. https://buyaglockonline78888.onesmablog.com/buy-a-glock-online-can-be-fun-for-anyone-73362713