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 18 - Jul 23

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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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Spacey
New York, US
★★★★★ 5
Works for my aggressive chewer
Color: GT-2P
It is extremely hard material! My puppy is 6 month old and rips through everything and these absolutely have lasted longer than any plush toys, bully sticks etc. I honestly didn't think I would like them for her but she definitely aggressively choose on these all the time and they hold up so well. If you have a dog that aggressively choose these work for mine.
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Reviewed in the United States on June 6, 2026
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vyanney
Bozeman, US
★★★★★ 5
Tough, durable, and appealing
Color: GT-2P, Color: GT-2P
My Belgium loved her new toys…. Instantly started to destroy them … I can already tell these will last a while with how tough they are.
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Reviewed in the United States on June 10, 2026
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DC
Whiting, US
★★★★★ 5
Recommend
Color: GT-2P
Received these chew toys earlier today and my dog latched onto them quickly. He has been alternating playing with these since delivery.
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Reviewed in the United States on May 25, 2026
M
McNatt
Grantham, US
★★★★★ 4
Got for larger pup, but younger/smaller pup likes them more.
Color: GT-2P, Color: GT-2P
I got these to try for our older pup that likes to chew on sticks and is always wanting to bring one inside, but I think he just prefers sticks instead. Our younger pup loves them though and steals them...runs off with one and chews on it...comes back and steals the other to take to her pile of toys for eventual destruction. That's just her nature. Ha ha! She is about 35 lbs. and, though these might be a little larger than I might have initially gotten for her, they are great and work just fine to keep her busy and entertained. I think the value for 2 super tough chew toys that are going to last more than a week is great. The texture of them is good for gnawing, or at least she thinks so. I would get them again but will not need to for awhile.
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Reviewed in the United States on June 8, 2026
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Terri
Charlottesville, US
★★★★★ 5
Yummy
Color: GT-2P
Dogs love them
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 3, 2026

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