These Backbottles will fit the following guns:
WWP guns including:
Razorbacks (various models)
Blackwidows
ACI guns including:
Mavericks
Hornets (undercocking)
PMI guns including:
Trracers
Trracer Tagmasters (undercocking)
(Not tested on new model trracer)
Kenimex guns including:
Scorpions
Blackhawks