SKU: 36406680452

Polarstar F2 HPA Engine Conversion Kit

Sale price$181.77 Regular price$201.97
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Ships within 48 hours · Estimated delivery Jul 14 - Jul 19

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Description

Polarstar F2 HPA Engine Conversion KitWe can custom anodize your F2 in the colors you want for $100 more. **All kits come with a Filter Fitting installed, FCU, Switchboard, Wire Harness and any additional components needed to convert the specific airsoft rifle model for which the kit is configured. The HPA Tank, Air Rig (regulator and line) and Battery needed to operate the system are purchased separately.** Winner of the "Best HPA Engine" in the 9th Airsoft Players Choice Awards, the

We can custom anodize your F2 in the colors you want for $100 more.


**All kits come with a Filter Fitting installed, FCU, Switchboard, Wire Harness and any additional components needed to convert the specific airsoft rifle model for which the kit is configured. The HPA Tank, Air Rig (regulator and line) and Battery needed to operate the system are purchased separately.**

 

Winner of the "Best HPA Engine" in the 9th Airsoft Players Choice Awards, the dual solenoid design of the F2™ provides the same functionality as the legendary Fusion Engine™ but in a more compact, efficient and flexible design. Dual solenoids allow for the nozzle and the poppet valve to be adjusted independently of each other for unparalleled control over both the loading time and air volume used. Additionally, this makes it possible to change the firing sequence giving it the ability to operate in both true closed bolt as well as "AEG" mode. (PolarStar Filter Fitting now included)

 

The F2™ incorporates a new one-piece, lightweight poppet valve design yet still operates on the same principle as the Fusion Engine™ poppet. This valve is able to operate at lower pressures and uses less air volume to function which optimizes air efficiency.

A robust design allows for an operating pressure range of 45psi to 145psi which enables the F2™ to achieve velocities from CQB to DMR while employing only one nozzle for the entire velocity adjustment range.

Additionally, its nozzle is spring biased forward which provides a consistent loading force regardless of operating pressure. It shares the same spring as the Fusion Engine™ with both light and heavy spring options available to adjust the loading force.

Gel Ball Compatible

F2 HPA conversion kits can also be configured for use in gel ball systems.

Please contact us for information on ordering F2 systems for gel ball use.

 

Velocity: 480fps w/ .20g @ 145psi
The F2™ allows for easy velocity adjustment just by changing input pressure and does not require different nozzles to reach its full velocity range. Using a standard M4 as an example, velocity can be adjusted from below 280fps and up to approximately 480fps with a .20g BB. Velocity can vary per model as longer barrels will increase the maximum velocity while shorter barrels will decrease it. 
ROF: 30rps
The maximum cyclic rate of the F2™ is affected by several factors such as the operating pressure as well as quality of the magazine and BB's used. However, 30 rounds per second is achievable in most standard configurations.
Air Efficiency: 1000+ shots from 13/3000 @ 1.5J  w/ .28g
The standard F2™ poppet valve is equivalent to the Red Low-Flow poppet of the Fusion Engine™. However, this valve responds faster and requires less air volume to operate so the F2™ is able to achieve greater air efficiency than even a finely tuned Fusion Engine™.
(Test Configuration: Red Poppet / 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: 36406680452

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David
Bozeman, US
★★★★★ 5
Exceeded expectations in every way.
Size: 2' x 3' (Sheepskin shape), Color: Gray Tip, Size: 2' x 3' (Sheepskin shape), Color: Gray Tip
I purchased a pair of these a week apart, because the price seemed too good to be true. Instead, they have exceeded my expectations. I own a Buick with leather seats that look incredible, but are not comfortable on long trips, and my wife and I were preparing to leave on a 2200 mile round trip vacation. On the first day, we drove 700 miles, much of it through desert. We were tired when we reached our destination, but comfortable and cool for every mile of it. The sheepskins have made such a difference, that I have never removed them from the car. It is now July, with triple digit temperatures every day, surrounded by desert. The sheepskin keep us cool on every drive. I could have purchased sheepskin seat covers, but these provide the same comfort for a fraction of the cost. Yes, it takes a small amount of effort to adjust them when you first get into the car, but I don't even think about it any more. As far as the quality, there is no shedding, no smell, and no discoloration. We have put over 4,000 miles on the car since I put these in, and I have no complaints to register.
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Reviewed in the United States on July 18, 2025
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Billy
West Palm Beach, US
★★★★★ 5
Great article
An excellent article. I use it on my furry cover and it works great. My cover looks fluffy and soft.
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Reviewed in the United States on May 27, 2026
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Verified Purchase
Lisa
Grantham, US
★★★★★ 5
Great for blankets
Great for making sherpa or fur blankets soft again after wash. I imagine it'll work well for fur hoods as well. It did a good job of removing lose hair fibers and the quality is good, even if it's extra spikey. Overall, affordable solution and good looking brush to rejuvenate faux fur
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Reviewed in the United States on August 2, 2025
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And N
Omaha, US
★★★★★ 5
Great but Pain
It’s alright, does the job as it is supposed to. It’s easy to use and helped fix my Uniqlo jacket that was all matted. It didn't restore it to it's original form however it did unmat it. If I bought this way before and touched up the jacket, I think it would of been perfect to this day still. Maintenance of those jackets are a must! The brush is strong and works well for fluffing it up because of the metal wiring. The only bad parts are that it can hurt if you accidentally poke or scratch yourself, I actually got cut by it when I quickly was brushing. It’s kind of hard to get the lint off the brush but it's better than others and might hurt because of the metal. But overall, it’s a cool tool that makes my jacket fluff again!
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Reviewed in the United States on August 24, 2024
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Watasnozle
Dallas, US
★★★★★ 4
Works well, however…
Purchased this to give life back to my Sherpa backed blankets. This is a well made brush handle is comfortable. The teeth are strong and durable. They did not bend around while I used it and maintained its shape. The problem I guess I’m seeing is that it doesn’t get deep down into the fabric to it’s just a surface “petting”. Maybe if the teeth were further apart or something. But does seem to provide some form of fluff.
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Reviewed in the United States on March 19, 2026

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