SKU: 45111087037

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

Sale price$314.95 Regular price$349.95
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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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4.2 ★★★★★
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Acrowbat
Lake Worth, US
★★★★★ 5
Suprisingly good quality and a great looking jacket
I have been searching for a ring master jacket for a circus themed gala where I will be the Auctioneer/Ring Master. All the other jackets I looked at were either cheap costume stuff or just looked a little too much military Hussar style with all of the added gold tassels. This has just the right class and definitely the right look. I was worried it would fit weird or just not be constructed well but I could not be any happier with this jacket- the sleeves are a perfect length when my arms hang at my side, as is the high waist cut and the length of the tails are also just right- and best of all the sequins really shine. I spent my career in the circus and the performing arts and this would have been more than acceptable on stage for someone to wear as a ring master or to look fancy and sparkly, assuming nobody will be standing on your shoulders and popping off your sequins. It is comfortable to wear, although I would not say it allows for full range of motion relative to a costume I would have actually worn in a circus while doing acrobatics. But that would be a totally hand made costume with flexible material and 4-10x the price. Overall it cannot be beat for your average wearer!
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Reviewed in the United States on January 9, 2023
E
Verified Purchase
Everett O'Keefe
West Palm Beach, US
★★★★★ 5
Order big!
Flashy and fun. Runs small so order big!
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Reviewed in the United States on January 21, 2026
J
Verified Purchase
JMcAfreak
Lake Worth, US
★★★★★ 4
Well Made, Runs A Little Small
I bought this on short notice for a drag show. I wasn't expecting a whole lot, but it exceeded my expectations in a lot of ways. The interior feels like the inside of a standard suit coat, and is comfortable for long term wear. The sequins are sewn on in a pattern, and there's little, if any, fallout. I've only found a couple sequins on the floor. I've used it a lot since the drag show, for a lot of things (live streams, videos, etc). Absolutely worth the price, and I've already gotten my money's worth out of it. It does run a little small, but it still mostly fits according to the size chart. A few notes: - It doesn't have button holes, so if you're looking for something that buttons up, look elsewhere. - Washing instructions say to machine wash cool, warm iron (do not tumble dry, do not dry clean). I'd say run it on the gentlest cycle you can muster, or just spot clean stains and the pits (if you're sweaty). I don't know how well this thing would survive a wash, but I haven't needed to wash it yet.
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Reviewed in the United States on June 12, 2021
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Callie Brant
Lexington, US
★★★★★ 5
Thrilled With Purchase
Size: 3X-Large, Color: Gold
Perfect, not too heavy, perfect for a Columbia costume!
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Reviewed in the United States on October 9, 2025
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Str8shooter3006
Omaha, US
★★★★★ 5
Showstopper
We got so many compliments on our outfits. I wore this for our Daddy/Daughter dance and plan to take it on a cruise later this year. The jacket is great quality and a little on the heavy side with all the sequins. It fit perfect in the shoulders and chest. It was a little long on the sleeves for my taste but I just tucked them under and managed for the night. For reference I’m 5’10” tall and 175lbs with athletic build. I bought a large.
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Reviewed in the United States on February 22, 2024

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