SKU: 45111087037

Fusion Engine™ Drop-In Kit V2 Gen 3 M4/M16

Sale price$314.95 Regular price$349.95
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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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Description

Fusion Engine™ Drop-In Kit V2 Gen 3 M4/M16The Original HPA Rebel The Fusion Engine was released in 2011 and was the first new HPA system to hit the airsoft market in over two decades. This is the system that started the HPA revolution and has set the benchmark to which all other systems are measured. Although many have followed it, the Fusion Engine is considered by most to be the best. This system won "Best HPA Engine" the very first year Popular Airsoft added the HPA class to their Players'

 The Original HPA Rebel

The Fusion Engine™ was released in 2011 and was the first new HPA system to hit the airsoft market in over two decades. This is the system that started the HPA revolution and has set the benchmark to which all other systems are measured. Although many have followed it, the Fusion Engine™ is considered by most to be the best. This system won "Best HPA Engine" the very first year Popular Airsoft added the HPA class to their Players' Choice Awards.


This is a complete drop-in system which replaces the entire AEG gearbox with a full CNC machined lightweight aluminum chassis. It is the most adjustable system we produce with the widest range of adjustment in both velocity and rate of fire. Being a dual solenoid, closed bolt system so you are able to adjust the poppet valve (firing air) and nozzle (feeding) independently for full control over both the loading time and air volume used. PolarStar Filter Fitting included.


Being a true closed bolt system it is easier to achieve a high level of accuracy since it is not as critical of the hop-up configuration as an open bolt system. Additionally, it does have the best feeling trigger since the trigger micro-switch is custom fit to the frame so the trigger has a distinct break, hard stop and short reset.



 

Gel Ball Compatible 

Fusion Engine HPA conversion kits can also be configured for use in gel ball systems.

Please contact us for information on ordering Fusion Engine  systems for gel ball use.

 

 

 

 

Velocity: 550fps w/ .20g @ 120psi.
Like other HPA systems, the velocity of the Fusion Engine™ can be fine tuned by adjusting the input pressure. However, there are also 6 nozzles available each with a different level of restriction which allows you to shift the velocity adjustment range up or down in large increments. This allows the Fusion Engine™ to have the widest velocity adjustment range of any of our systems.
ROF: 30rps+
The maximum cyclic rate of the Fusion Engine™ is affected by several factors such as the operating pressure as well as the quality of the magazine and BB's used. However, 30 rounds per second is achievable in most standard configurations.
Air Efficiency: 400+ shots from 13/3000 @ 1.5J  w/ .28g
This system was primarily designed to deliver maximum power so air efficiency was not a critical part of its development. However, thanks to the modular design of its poppet valve, the system can be fine tuned using more restrictive valve stems and shims which allows air efficiency to more than double when operating at traditional field velocities.
(Test Configuration: Black Poppet / Blue Nozzle / 6.05x375mm Barrel)
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 45111087037

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Kiyoshi Higashimura
Belleville, US
★★★★★ 4
Quality
Flavor Name: Mango Habanero, Size: 16 Ounces (1 Count)
Very soft and tasty but Habanero is little too spicy for me.
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Reviewed in the United States on March 31, 2026
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Professor X
Port Orchard, US
★★★★★ 5
Delicious
Flavor Name: Mango Habanero, Size: 16 Ounces (1 Count)
Delicious! I was worried it would be too spicy but while it is definitely spicy it is not so much so that it is unpleasant. Just enough to keep me from overindulging - a few pieces at a time is just right.
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Reviewed in the United States on May 5, 2026
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Alec
Port Orchard, US
★★★★★ 3
Moderate sweetness, low heat, way too soft and moist to be the chewy jerky I look for
Flavor Name: Mango Habanero, Size: 16 Ounces (1 Count)
To get to the point, this jerky is too soft and moist. Impressively tender actually. The sweetness and heat are nothing special, but you do get 1lb of jerky that is easy to snack on. For that, I have to give it at least 3/5. There are a ton of jerkys with better taste and texture that are definitely more expensive, but if you happen to like a super tender jerky with underwhelming flavors, then this is a good value.
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Reviewed in the United States on March 20, 2026
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Mammon
Los Angeles, US
★★★★★ 5
Not your average sundried roadkill 😋
Flavor Name: Mango Habanero, Size: 16 Ounces (1 Count), Flavor Name: Mango Habanero, Size: 16 Ounces (1 Count)
Ok , so just don't look at the price. Think of it like this - go buy 3lbs of quality beef at the store , spices, gas to drive there , dry it down to 1 lb and you'll spend just as much . This is'nt gobble down stuff , its more of a special treat like a glass of fine scotch. Cudos to the lady with the review 'more mango than hot'. This is a tender quality jerky with a really good flavor and a nice balance of sweet n spicey, not burn your face off. It's really tender and the first thing I noticed was that it didn't get stuck in my teeth .... AT ALL. Even my own home made jerky that I trim up six ways to sunday gets stuck in my teeth. It's very tender , I think some folks mistake sticky sugary corn syrup gooped up roadkill for 'moist' . This is actually mostly just MEAT with a good moisture content and it was very yummy 👍
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Reviewed in the United States on July 18, 2025
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B
West Palm Beach, US
★★★★★ 5
Great socks
My fav socks. I am a size 9 women’s and they fit perfect. They are soft and comfortable
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Reviewed in the United States on April 16, 2026

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