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 31 - Aug 5

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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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4.4 ★★★★★
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DRL
Whiting, US
★★★★★ 5
Excellent product and my dog loves it
Style: Classic, Size: 26in
I love these toys almost as much as my dog! It makes throwing a ball over and over much less straining on my shoulder and also allows me to pick the ball up without getting slobber all over me. Chuck-it products are high quality and they're the only ball I will buy now- it's my dog's favorite!
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Reviewed in the United States on April 2, 2026
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Verified Purchase
Amazon Customer
Birmingham, US
★★★★★ 5
Ball launcher
Style: Classic, Size: 26in
Love this!! Our back yard is a little more than 3/4 of an acre,and this will send a ball almost the entire distance ,which our pittie loves ! Easy way to tire out a super energetic pup !! Well made considering it's used A LOT,it's held up great!
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Reviewed in the United States on April 5, 2026
M
Verified Purchase
McKay Marshall
Belleville, US
★★★★★ 5
Solid, Quality Construction at a Value
Style: Classic, Size: 26in
It's amazing how much fun my new puppy and I have been having with a single, vacuum-molded piece of plastic. I have a 4mo named Walter and getting a Chuckit® was always in the cards. 1: I didn't know how cheap they were, and 2: I didn't realize how much fun it makes fetch. Really small things like being able to pick up the ball with the Chuckit® without having to bend down was so surprising and makes fetch last longer for both of us. Another tip is that I had watched videos where they say the throwing technique is sort of a punch, or whip action; where you sort of wind-up, throw, and then jerk your hand back (like cracking a whip). I started doing that and it was fine, and working without problems. But then I thought, "I'm just going to launch this with one continuous movement". And WOW what a difference. If you have the space (a big field, basically), you don't need to modify your throw to a punch or whip type movement. Just launch it like you're casting a fishing pole, and end your motion with the Chuckit® pointing directly at where you're trying to throw it. The ball naturally flies out at about a 45 degree angle. High and far. You don't need to overthink it. Additionally, if I'm in my backyard (fenced with neighbors all around) and I can't go high and far, I just side-arm it. And the ball releases on it's own. No need to whip. Looking forward to my Pup growing up so we can play longer. Love this thing. Oh one more tip from my brother– he says a lacrosse ball fits perfectly in these things too if you have a dog that wants to destroy your tennis balls. Lacrosse balls are practically indestructible. Just make sure not to launch it on any surface that will bounce, or you'll never see it again. I'd buy this again in a heartbeat. For the price, stop thinking about it, buy it, and go play with your dog!
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Reviewed in the United States on June 10, 2020
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Verified Purchase
Veronika Pechova
Whiting, US
★★★★★ 5
Superior quality
Style: Classic, Size: 26in
We have 2 Australian Shepherds that never get tired. The launcher is able to trow the ball very far and very durable. Dogs love the ball and they were not able to destroy it yet. We are very happy with our purchase.
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Reviewed in the United States on April 3, 2026
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Verified Purchase
Megan & Andrew
Natrona Heights, US
★★★★★ 5
Fetch? Yes please!
Style: Classic, Size: 26in
Great for fetch. Small learning curve to release the ball where you want. Good size for my dog. Comes with a felt ball which is just stupid for fetch--gets so dirty. I like the color, my dog can see blue and she loves when I bring it out. I broke my first one, snapped the neck, but these work great, fine price. The amount of joy my dog gets from it is worth every penny.
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Reviewed in the United States on October 30, 2025

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