A printed detent-cut grip module now lets users change safety selectors on certain 3D-printed lowers without altering the receiver. The part follows the same approach already used on Leber V2 designs.

Installers place the detent and spring in the usual AR-15 manner, add the printed rod, and finish with an M5 set screw. Files cover every YKY lower variant plus the Smp5k lowers.