MechLabs

If you're planning on upping your game with an HPA build, the MechLabs XX-MOD Mechanical HPA Engine for M4/AR-15 AEGs is a great choice. Precision-machined from Series 6 aluminium, the XX-MOD is a drop-in installation in any M4/AR-15 AEG, adapting to various receiver types using its innovative 3-axis XYZ alignment system.

Being a purely mechanical engine, the XX-MOD doesn't require a battery, giving you one less thing to remember when packing for a game. This also makes the XX-MOD waterproof, and while we don't recommend doing an "over-the-beach" test with it, it can handle wet weather in its stride. Despite its mechanical operation, the XX-MOD still provides both semi-automatic and fully automatic fire modes thanks to its internal "auto block" and optimised burst management.

The most advanced mechanical HPA engine on the market today, the XX-MOD is ideally paired with a MechLabs ROTO HOP-up unit and is pre-fitted with a US Foster connector, aka a "quick fitting" for an HPA line, regulator and bottle setup. If you're moving over to the world of HPA, you'll be well-equipped with the MechLabs XX-MOD Mechanical HPA Engine for M4/AR-15 AEGs!

If you're after a potent, innovative HOP-up system to top off your HPA build, the MechLabs ROTO Standard Bucking-Less HOP-up Chamber for HPA is a fantastic choice. An innovative new take on the HOP-up system, the ROTO uses a precision micro-injected nub built into the HOP-up arm, but eliminates the HOP-up bucking from the equation entirely.

This means no more replacing HOP-up buckings once they wear out, less hassle with installation and a far stronger, more precise HOP-up effect, especially when used with high-energy setups running heavy BBs. The rear collar of the unit is adjustable, allowing you to tune it to suit your nozzle length, though it does require a micro-adjustable nozzle, meaning it won't work with AEG builds.

Compatibility-wise, this is strictly for HPA setups and is ideally paired with a MechLabs HPA engine. Other compatible engines include PolarStar Jack, Kythera and F2, Wolverine Inferno Gen.2, Reaper and Hydra, and Gate PULSAR engines. These engines all require nozzle tuning either via the engine's adjustment or by adding shims for perfect feeding and air seal.

Using a MechLabs X-MOD, XX-MOD or NEXXUS engine with the ROTO allows you to take advantage of the ZERO Cap system, which means you can thread the HOP-up chamber into the front of the HPA engine to prevent alignment issues and maximise efficiency.

If you're gearing up for an HPA setup, this is essential! The MechLabs Micro Airline measures roughly 100cm in overall length and comes fitted with a US-type/Foster 22-2 connector for wide compatibility. At 40 inches, the airline keeps things compact while still giving you plenty of flexibility and agility, reducing the chances of snagging while you're on the move.

Its Foster-style quick-disconnect fittings make it ready to integrate into most HPA systems. Its large internal bore provides ample airflow for high-rate-of-fire setups while reducing the risk of restricted airflow if the airline is compressed. If you're about to hit the field with your HPA setup, don't forget the MechLabs Micro Airline!

If you're working on an ultra-premium HPA build, the Mechlabs ROTO Pro CNC Bucking-Less HOP-up Chamber for HPA is an essential part! An innovative bucking-less design made entirely from CNC-machined aluminium, the ROTO Pro uses a precision micro-injected nub built into the HOP-up arm, eliminating the HOP-up bucking from the equation entirely.

This means no more replacing HOP-up buckings once they wear out, less hassle with installation and a far stronger, more precise HOP-up effect, especially when used with high-energy setups running heavy BBs. The rear collar of the unit is adjustable, allowing you to tune it to your nozzle length, though it requires a micro-adjustable nozzle, so it won't work with AEG builds.

The "Pro" version of the ROTO boasts a full CNC aluminium build, a more robust alternative to the ROTO Standard. The HOP-up dial is also enlarged to provide more precise dialling and more setting options, so you can tune to perfection.

Compatibility-wise, this is strictly for HPA setups and is ideally paired with a MechLabs HPA engine. Other compatible engines include PolarStar Jack, Kythera and F2, Wolverine Inferno Gen.2, Reaper and Hydra, and Gate PULSAR engines. These engines all require nozzle tuning either via the engine's adjustment or by adding shims for perfect feeding and air seal.

Using a MechLabs X-MOD, XX-MOD or NEXXUS engine with the ROTO allows you to take advantage of the ZERO Cap system, which means you can thread the HOP-up chamber into the front of the HPA engine to prevent alignment issues and maximise efficiency.

The MechLabs FLO MAX is a high-flow HPA regulator designed to provide a stable, consistent supply of air, even when paired with demanding HPA engines. Its enlarged internal air channel increases airflow capacity, helping prevent air starvation during high-rate-of-fire and high-demand setups, including the Nexxus full-auto firing mode.

The FLO MAX is designed to work across a wide range of HPA engines, from lower-pressure systems through to high-flow platforms. Its high-volume airflow helps maintain consistent performance under load, while the integrated TS On/Off module provides greater control when pressurising and depressurising the regulator.

The On/Off function allows the regulator to be safely pressurised or depressurised at the press of a button, reducing stress on the regulator threads and helping prevent accidental shots during handling or maintenance. The redesigned module also improves internal airflow for smoother and more consistent air delivery.

Built for durability, the MechLabs FLO MAX features a CNC-machined T6 aluminium body with an anodised finish for increased resistance to corrosion and wear. A quick-connect (QC) valve also makes maintenance and cleaning straightforward, while output pressure can be adjusted using a standard ⅛" hex key.

If you're fixing up your MechLabs HPA setup, the MechLabs O-ring kit is great for improving the air seal! This set includes O-rings in various sizes and thicknesses, designed to provide a superb air seal throughout your whole MechLabs HPA setup.

They are constructed from high-quality silicone rubber, making them durable and reliable. They are designed to drop into various parts of the MechLabs HPA setup, making installation relatively straightforward with little modification.

The MechLabs O-ring kit is compatible with MechLabs HPA components as it is a factory OEM replacement part.

The MechLabs Flo J Regulator is a compact, high-performance HPA regulator designed for players who want reliable airflow, fast recharge and consistent output pressure in a simple, beginner-friendly package. Made in Taiwan using premium materials, the Flo J is suitable for both new HPA setups and players looking for a reliable secondary regulator.

The regulator body is CNC-machined from a single block of 6061 anodised aluminium, providing a lightweight yet highly durable construction. Inside, stainless steel and brass alloy components are used throughout to withstand pressure and resist wear over time.

Designed specifically for solenoid HPA engines and GBB platforms, the Flo J delivers high airflow and a fast recharge rate to help maintain stable output pressure during rapid firing. Output pressure can be adjusted from 40 to 200 PSI, making it suitable for a wide range of HPA applications.

The Flo J is available in a choice of anodised finishes, allowing you to match your regulator to the rest of your setup. Whether you're building your first HPA rig or adding a dependable backup regulator to your kit, the MechLabs Flo J provides a straightforward combination of performance, durability and ease of use.