HPA

Replacement O-rings and regulator seat for your WRAITH X. Description Includes AS-568 015 (x2) 1mm x 5mm 1.5mm x 18mm 1.5mm x 8mm 1.5mm x 19mm 1.5...

Includes Spacer O-rings Piston Spring Weight .55 oz Dimensions 4 × 2 × 1 in STORM Version Standard, High Pressure

Is your Spartan line not long enough for your setup? Grab this wiring extension! Weight .3 oz Dimensions 4 × 2 × 1 in

Replacement O-rings for your INFERNO Gen 2 engine. Does not include O-rings for solenoid valves. Includes 1 x 10.5mm (x1) 1 x 13mm (x3) 1.5 x 18mm...

90 deg. rear air (Milsim) fitting

Original Banjo Fitting used on all versions and generations of the Fusion Engine. Price includes one (1) fitting.

The air nozzles for the Fusion Engine come in up to 6 different colors which identify how much the nozzle restricts air flow out of the engine. Th...

Introducing the perfect battery for ESG / HPA Builds! VOLT HPA Battery: Extremely small form factor to fit in even the tightest of spaces! 34x18...

Monk Customs presents AG24 — Our 24° angled grip for your M4! AG24 is instantly recognizable as Monk Customs' ESG family member, boasting its famou...

The Monk Straight Adapter for Hi-capa gives you all features like before with one difference.These adapters can be used for all below magazines now...

Monk Customs' game-changing M4-adapter is back, with an aluminium vengeance!The ultimate Ultra Light M4 Adapter is your go-to choice if you need a ...

The HK Army MP5 Regulator, meticulously crafted for reliability and ease of use. Engineered with a constant output air flow, this regulator effortl...

Compatible with V2 gearboxes, the Spartan Edition allows users to use HPA without the headache of figuring out all the settings. By combining the t...

Replacement control board for the MTW Billet Series, the Spartan Electronics board is a trigger board and FCU all-in-one. The key advantage of the ...