MADE IN THE USA!!!!
SRT piston –Sonic Recharge Technology piston – plated aluminum piston that produces an industry leading recharge rate and virtually eliminates reg shoot down
SPA – Shim Pressure Adjustment- change output pressure by adding or removing shims, not springs or pistons
MFV – Mini Fill Valve – Non wrist digging, low profile design fill valve
All black tactical look
Carbon Fiber Wrapped Bottle