S&T Armament ZCI Rotary HOP-Up Unit for M4/AR-15 AEGs

If you want a budget-friendly HOP-up upgrade without sacrificing performance, the S&T Armament Rotary HOP-Up Unit for M4/AR-15 AEGs is a smart choice. Highly regarded by Airsoft techs, this polymer rotary HOP-up chamber from S&T Armament offers excellent compatibility and consistently tight tolerances, delivering impressive results across a wide range of bucking and nub setups. Supplied as a near drop-in solution, the set includes everything required to build the HOP-up unit aside from the inner barrel. It comes paired with a silicone HOP-up bucking and a standard cylindrical nub, making it well-suited to medium-power builds around 350 FPS. For players focused on reliable, cost-effective performance upgrades, the S&T Armament Rotary HOP-Up Unit for M4/AR-15 AEGs is an easy addition to any upgrade kit.

Brand

S&T Armament

Category

gear

From

6.99 GBP

Where to buy

• Patrol Base — 6.99 GBP In stock

Specs

Upgrades & Maintenance > General Internal Parts