MechLabs Nexxus SA HPA Engine Gearbox Kit
Price: $359.99 – $469.99 — In stock at 13 retailers.
Prices last checked August 20, 2026 across 4 retailers.
MechLabs Nexxus SA HPA Engine Gearbox Kit Pure Mechanical Power, No Batteries Needed The MechLabs Nexxus SA HPA Engine Gearbox Kit is a revolutionary drop-in upgrade designed for serious airsoft players who demand precision, durability, and complete mechanical reliability. This full-mechanical HPA system operates without any electronics or batteries, delivering consistent performance powered entirely by compressed air. Compatible with most Version 2 M4/AR15 AEG gearboxes, it supports both semi and full auto fire modes via selector switch, offering intuitive and responsive control right out of the box. High Efficiency Meets Elite Performance Built with a CNC-machined aluminum body, the Nexxus SA is lightweight yet rugged enough for intense field action. It features an adjustable trigger with slip-resistant grooves for superior tactile control and an ultra-fast trigger response for rapid follow-up shots. Optimized for air efficiency, this engine can deliver up to 3,000 shots from a single 48/4500 HPA tank, making it one of the most efficient systems available for players who value sustained combat performance. Customizable, Drop-In Ready HPA Upgrade Whether you're running a CQB build or a high-speed field rifle, the adjustable rate of fire (14–36 RPS) lets you fine-tune performance to your playstyle. The Nexxus SA comes pre-installed with an M4 nozzle and supports other Version 2 nozzles (sold separately) for added versatility. It's fully drop-in ready for use with an external regulator, and for those seeking an all-in-one solution, an optional stock tank kit with built-in regulator is available. Join the HPA revolution with a truly mechanical engine built for peak performance. Specifications Brand: MechLabs Tank Compatibility: Up to 48/4500 (not included) Shots per Tank (w/ 48/4500): 3,000 Fire Rate (Adjustable): 14–36 RPS Compatibility: Most Ver.2 compatible gearbox Airsoft AEGs Nozzle Included: M4 (other Ver.2 nozzles sold separately) Color: Black Features Full mec
MechLabs Nexxus SA HPA Engine Gearbox Kit price comparison: the lowest price is $359.99 at Evike, the highest is $469.99, and the median across 18 tracked listings is $450.00. Comparing retailers can save up to 23% ($110.00) versus the highest-priced listing.
Where to buy the MechLabs Nexxus SA HPA Engine Gearbox Kit: prices at 18 retailers
- Evike: $359.99 — In Stock
- Evike: $359.99 — In Stock
- AirsoftGI: $400.00 — In Stock
- AirsoftGI: $400.00 — In Stock
- Xtreme Airsoft: $400.00 — In Stock
- ...and 13 more retailer listings compared on this page.
Frequently asked questions about the MechLabs Nexxus SA HPA Engine Gearbox Kit
- How much does the MechLabs Nexxus SA HPA Engine Gearbox Kit cost?
- The MechLabs Nexxus SA HPA Engine Gearbox Kit ranges from $359.99 to $469.99 across 4 retailers. The lowest current price is at Evike. Prices are updated regularly from each store's live catalog.
- Where can I buy the MechLabs Nexxus SA HPA Engine Gearbox Kit?
- The MechLabs Nexxus SA HPA Engine Gearbox Kit is currently in stock at 13 retailers including Evike, Evike, AirsoftGI. We track availability across 4 airsoft stores and update stock status regularly.
- Is the MechLabs Nexxus SA HPA Engine Gearbox Kit a good hpa engines upgrade?
- The MechLabs Nexxus SA HPA Engine Gearbox Kit by Mechlabs is listed in our HPA Engines category and is priced from $359.99. We aggregate prices from 4 retailers so you can compare and find the best deal. Check the price comparison table above for current pricing from each store.
More HPA Engines parts to compare
- PolarStar Kythera V2 HPA Engine — compare across 4 retailers
- ARES HPA Engine Gearbox Set V2 for Tokyo Marui / Ares M4 AEG — compare across 4 retailers
- Polarstar Kythera HPA Engine — compare across 4 retailers
- Polarstar F2 HPA Engine — compare across 3 retailers
- GATE PULSAR D HPA Engine (ETU not included) — compare across 3 retailers
- Amped Airsoft SLP QD Air Regulator System for Polarstar Fusion Engine PR15 Airsoft EPAR Rifles w 36 Air Hose — compare across 3 retailers
- GATE PULSAR D HPA Engine — compare across 2 retailers
- Gate Pulsar D HPA Engine with TITAN II Bluetooth Expert [Rear Wired] — compare across 2 retailers