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SKU: 5

BigRRR Mosfet for V2 Gearbox

4 total reviews

Vendor BigRRR
Regular price $85.00
Sale price $85.00 Regular price
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This is a pre order item. We will ship it when it comes in stock.

The BigRRR features an active Braking System that positioning gears and reduce motor abrasion. The BigRRR uses a micro switch that allows for quick trigger response. The programable functions include a reliable semi, Binary and 3-5 round bursts.

The mosfet has a 2-second Magazine Prime that can be turned off and also features a Short circuit and stall protection to try and preserve the mosfet if the batteries or shorting causes any issues

-Supports 7.4V-11.1V Batteries 

-Compatible with A1 Motor.

We recommend having our technicians to install mosfet, as any damage to the mosfet during unauthorized installation will void the warranty.

Accordion (reviews)

Customer Reviews

Based on 4 reviews
Adam May
Big RRR mosfet from WAT

I'm very happy with my purchase, never had any problems with these Mosfets. I run them in most of my blaster builds

Easy improvement for cracked Wells metal gearbox together with LDX expert housing :)

= Cracked gear box of Wells Metal CQB M4 + LDX expert V2 gear housing + Bigrrr Mosfet =

This is my story about my “gearbox cracked Wells M4” and this very reliable and reasonably priced easy installation electric trigger mosfet system.

After I had swap the gear housing with LDX Expert, I realised not often but sometimes this gun skip the gelball shooting in full auto with 11v battery (no issues with 7.4v but.) And I realised sector gear was slipped slightly because of gear stopper was malfunctioning sometimes with 11v speed…

It had same tendency with original zinc housing but probably gears can turn even quicker with LDX expert housing (may be it’s caused by less friction from my good gear shaft shims and LT2 gear grease instead of sticky and heavier factory silicon grease…)

The semi auto stopper obviously has the timing issues now.

So I had decided to put this from WAT.

The steel sector gear came with Wells metal M4 had a exact hole to be installed the magnet for the position sensor. (What you have to do is just a little bit of “touching” inside of the hole you wish to install the magnet on the sector gear with a drill’s tip to smoothing…

Installation of Bigrrr mosfet is so simple and the one from WAT already connected with gen8 style magazine terminal connectors (many of this kits available on the chinese shops on the webs are for Airsoft and has no mag terminal cables connected…).

As the result, my gun has auto preloading gelball function and various programmed semi-auto functions. :)

Thank you WAT :)


So hubby has put it in gel blaster and loving it

Damian Stephens
BigRRR Mosfet

Excellent product, easy to install and operate. My next blaster I build will definitely include one.