A designer has introduced an untested FTN.5 PCC 9mm Sleeved component that uses FTN 1.5×8 threads to mate with the Comstock Form 1 LPA, which itself converts to a Plan B mount. This version forgoes the earlier 3/4×16 adapter approach.

Adapters supplied in the FTN Rifle Pack will not work because they exceed the available length. A retention lip matching prior FTN PCC and rifle models is present, and the outer size was grown to nest inside 2 inch aluminum tube. The creator suggests a PLA print to check adapter fit before other materials.