Recover Tactical SPRO Adapter Springfield Hellcat Carbine Conversion Kit Black. One of the unique charcateristics of S-pro is its wide compatibility with just the switch of the adapter pieces. Each adapter set includes everything you need to use S-Pro with the compatible gun. Package Contents: Recover Tactical SPRO Adapter Springfield Hellcat Carbine Conversion Kit Front Adapter Back Adapter Charging Handle What firearm models does the manufacturer say Recover Tactical SPRO Adapter Springfield Hellcat Carbine Conversion Kit is compatible with? The manufacturer says that Recover Tactical SPRO Adapter Springfield Hellcat Carbine Conversion Kit is compatible with Springfield Armory Hellcat Glock 20 Glock 21 Glock 40Recover Tactical 7290117422991: SPRO Adapter Springfield Hellcat Carbine Conversion Kit Black