DO YOU BUY USED AIRSOFT REPLICAS?

Yes, we buy back certain used airsoft replicas and equipment! However, the evaluation must be done in-store. Our team will test the replica on-site to verify its functionality and overall condition before making you an offer. If it's accepted, the value will be converted into store credit, usable on all your future purchases. Simple, quick, and convenient!

DO YOU OFFER REPAIRS AND MAINTENANCE ON REPLICAS?

We offer a fast and efficient repair and maintenance service — so reliable that other stores trust us to repair their replicas. Our expert Martin, with over 13 years of experience in the field, is known for his high-quality work and quick turnaround. A technician will clearly explain all available options, estimated turnaround times, and associated costs before any work begins.

WHAT IS YOUR WARRANTY AND RETURN POLICY?

We offer a fast and efficient repair and maintenance service — so reliable that other stores trust us to repair their replicas. Our expert Martin, with over 13 years of experience in the field, is known for his high-quality work and quick turnaround. A technician will clearly explain all available options, estimated turnaround times, and associated costs before any work begins.

DO YOU OFFER CUSTOM UPGRADES AND MODIFICATIONS?

Yes! At District Airsoft, we offer a complete upgrade and customization service for your replicas — both internally and aesthetically. Whether you're looking to improve range, accuracy, or rate of fire; reinforce your gearbox for reliability; or personalize the look of your replica... Our head technician Martin (with over 13 years of experience) is here to advise you and handle the work. We also have access to several specialized suppliers that are rarely available in Quebec, such as FPS Softair, Quantum, Maxx Model, Silverback, Retro Arms, and many more. This means you'll have access to high-performance parts to optimize your replica exactly to your needs.

TALK ABOUT DISTRICT AIRSOFT AND EARN STORE CREDITS TO EQUIP YOURSELF!

At District Airsoft, you can earn store credits to spend in our shop every time a sale is made through your personalized link or promo code. Apply here: https://af.uppromote.com/districtairsoft/register. We review your application and ask for a solid reason (e.g. streamer, YouTuber, influencer, or someone active in the airsoft community). If accepted, you'll receive a personalized link and promo code earning you store credits on every sale. Cookies remain valid for 5 days after the click. No minimum sales required.

MECHLABS GEARBOX NEXXUS HPA internal unit in black carbon finish with trigger assembly and brass air fitting

MECHLABS NEXXUS HPA ENGINE GEARBOX FOR M4/M16 AIRSOFT AEG

Out of stock

$650.00 CAD

CouleurBlack

✅ Free & Tracked Shipping over $250 (rates by province)
✅ 30-Day Hassle-Free Returns
✅ Found It Cheaper? We Price Match

MECHLABS NEXXUS HPA ENGINE GEARBOX FOR M4/M16 AIRSOFT AEG

the mechlabs nexxus nexxus hpa engine gearbox is an entirely mechanical hpa system designed for m4/ar15 airsoft aegs. this engine requires no battery; simply connect an hpa tank to fire in semi or full auto. it offers ultra-fast trigger response and high efficiency, delivering over 3,000 shots per 48/4500 fill.

Features

operation: fully mechanical engine – no battery required.
construction: lightweight and durable aluminum body.
firing modes: semi auto and full auto via selector switch.
trigger: adjustable trigger with anti slip grooves; ultra fast trigger pull for optimal responsiveness.
efficiency: very efficient – up to 3,000+ shots with a 48/4500 tank.
installation: comes ready for external regulator; stock mounting kit with integrated regulator is available (sold separately).

Specifications

compatibility: most ver. 2 gearboxes (m4 nozzle included, others sold separately).
tank compatibility: up to 48/4500 (tank not included).
shots per tank: 3,000+.
adjustable rate of fire (rof): 14 to 36 rps.

HPA Systems Warning

never oil the fill valve (risk of combustion).
filling only by qualified professionals.
never exceed 120 psi.
hydraulic testing required every 3 to 5 years.
transport securely, avoid impact.
always close and purge after use to extend system lifespan.

Also bought with :

Out of stock or want to pre-order?

Use the Back in Stock Alert / Pre-Order button located below the Buy button.

By clicking it, you’ll automatically receive an email notification when this item is back in stock.

We’ll also contact you directly to confirm whether you’d like to pre-order this product as part of our next order.

Policy & shipping details :

District Airsoft ships everywhere in Canada (no international shipping) with an estimated processing time of 1–3 days.

Estimated Delivery Time: 3–9 days, depending on the province.
Shipping Fees: Fees are fixed per province.
Free Shipping: Available for orders of $250 or more (region-dependent).
Carriers Used: Purolator, UPS, FedEx, Canpar and many more !
Tracking: Tracking information is provided via email.
Signature Required: For select products and certain delivery addresses ( busy city / appartment), a signature on delivery is required to prevent theft. In some cases, this is also mandated directly by the carrier and is outside our control.

Please verify your shipping address carefully before checkout. Report any damage within 48 hours of receipt. District Airsoft is not responsible for delays caused by weather, carriers, or peak periods.

For more information: Shipping Policy.

Buying used doesn't mean buying a risk. Every pre-owned replica sold by District Airsoft goes through the same return and warranty process as our new products, and is backed by our standard 30-day store warranty.

Before any used replica is listed for sale, it passes through our in-house tech shop where it is:

Inspected for function, wear, and internal condition
Cleaned inside and out
Repaired or serviced as needed to meet our quality standards

We hold every used replica to the same high standard as a brand-new one before it ever reaches your hands. If something isn't right, you're covered exactly like you would be with a new purchase — same 30-day warranty, same in-store process.

Questions about a specific used item? Contact us at boutique.districtairsoft@gmail.com or 450-760-7185.

[Full details in our Refund Policy]

All replicas — new or used — include a 30-day store warranty covering manufacturing defects and major malfunctions.

Need service after that? District Airsoft offers in-house repairs and upgrades from certified techs, even outside the warranty window.

In-store warranty claims: Bring your invoice + complete product
Post-warranty repairs: Available as a paid service
Tech consultations: Ask us before you buy if you're unsure about compatibility

Questions about a specific used item? Contact us at boutique.districtairsoft@gmail.com or 450-760-7185.

[Full details in our Refund Policy]

What Counts as a Match

To qualify, the deal has to be apples-to-apples:

Same brand, same model, same color — brand new and factory sealed
The competitor has an actual storefront (online-only retailers don't qualify)
Their price is live and the item is in stock right now
It's a standalone price, not stacked with a coupon, rebate, or bundle deal

How to Get It

Email sales@districtairsoft.ca with a link or screenshot of the competitor's price before you place your order. We need to approve the match first — we can't apply it retroactively after you've already checked out. Once we confirm the price and stock are real, you're good to go.

What Won't Qualify

A few things fall outside the policy: