This 4500 black reg works on any 4500 bottle and on all paintball guns. The Black Ninja paintball regulator is also an adjustable regulator. The Black reg is adjustable between 450-850 PSI output pressure. With pressure adjustability like this, you are able to use it on any gun and be sure to get the best performance. Ninja UL Tank Regulator Only 106 gr 3,50 cm from bottle to ASA All black tactical look 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 Aluminum bonnet and Mini Gauge installed Meets all DOT, CGA and ASTM specifications Completely rebuildable by the user Every regulator is hand crafted and factory tested Super low response curve 0-50 psi from full to empty Ninja Ultralite Tank Regulator Safety ASTM COMPLIANT bonnet thread ASTM COMPLIANT DOT burst disc ASTM COMPLIANT Low pressure burst disk ASTM COMPLIANT Restrictor, bleed hole and safety groove Mini Fill Valve IS hardened, plated 5000 psi rated