S-PRO is our next-level pistol conversion kit featuring a spring-loaded stabilizer (which can be converted to a buttstock by removing the included brace attachment) MLOK mounting options and broad compatibility. – S-Pro is compatible with Glock Canik & Walther PDP. Pre-order for SIG X Macro Large Frame Glock & Hellcat here with more to follow. The unit is designed to be modular and using it with another compatible gun will only require swapping a small adapter piece which will be sold separately. – S-PRO Key Features – Metal frame – MLOK-compatible front shroud – Push button release spring loaded stabilizer/buttstock – Modular unit swap out adapters to use the same platform for different pistols – No tools are required to install – Compatible with high-profile slide-mounted optics – S-Pro is compatible with TP9 SF Elite TP9 SF Elite S & Mete SF.