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Home » Airsoft Accessories, Attachments & Parts » AEG Internal Parts » Gearbox » Version 2 Gearboxes

Delta Armory Complete Version 2 Gearbox for M4 AEG Airsoft Rifles

ID: 120480 (GB-DA-ACC-13)
DA-ACC-13
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Delta Armory

$49.98

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The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.

Description

Specs

Reviews

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Product Description

Features

  • Durable metal alloy shell
  • Heavy duty SHS internal parts such as the feed lever and piston wheeel
  • 14 tooth SHS piston
  • Designed with a QRS System for quick spring replacement and changes
  • 7mm bearings

Manufacturer: Delta Armory

2 Customer Reviews

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by Justin R. on 12/29/2025
"Got this gearbox for a cheap build because it had a good price and looked high quality. The internals of this gearbox are very solid - the gears are actually higher quality than most stock gearboxes - and nothing looks like it's gonna break easily. The only thing that may break eventually is the spring lead, as it doesn't have a bearing, but that's to be expected for a $50 gearbox. It comes with a basic main spring, probably an M120, and the cylinder and piston has good air compression. The cylinder is not ported, but I don't think it shoots any faster than 400 fps. I threw a super basic mosfet in this so I could run it on an 11.1, and it has very good rps. Nothing crazy but won't leave you wanting more. The sound it makes when shooting is a little unusual but also sounds pretty epic. It sounds like a mix of a gbb and a star wars blaster.

Overall it's very good and definitely would recommend to anyone looking for a cheap gearbox that they could build a gun around.
by Justin R. on 01/14/2026
"UPDATE:
Actually got a chance to use the gearbox in an actual battle and put it through an average amount of stress. It performed great for most of the day, but right at the end of the day when I was getting ready to put it away in my bag, I shot a quick burst on full auto to dump what little was left in my mag and the gears stripped. Opened it up later and found that one tooth had broken off of the spur gear and the bevel gear had completely stripped every tooth. So much for "above average gear quality" and "nothing looks like it will break easily" as I stated in my first review lol.

Overall this gearbox is still pretty good for the price. Just be aware that you may need to replace the gears practically immediately. I'm going to throw in some cheap replacement gears that aren't too expensive. Hopefully nothing else breaks lol.

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Delta Armory