SKU: 94687829018

PolarStar F2 Conversion Kit V2 M4-M16

$288.00 $320.00
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Description

PolarStar F2 Conversion Kit V2 M4-M16PolarStar F2 V2 HPA Conversion Kit M4 AEG Gearbox The PolarStar F2 is a highly adaptable HPA engine designed to replace the Version 2 gearbox in M4 AR style AEG rifles. Known for its efficiency, precision, and durability, the F2 offers the performance of a dual solenoid HPA system in a compact, drop in package. High Performance HPA System The dual solenoid design provides independent control over the nozzle and poppet, allowing fine tuned adjustments

PolarStar F2 V2 HPA Conversion Kit – M4 AEG Gearbox

The PolarStar F2 is a highly adaptable HPA engine designed to replace the Version 2 gearbox in M4/AR-style AEG rifles. Known for its efficiency, precision, and durability, the F2 offers the performance of a dual-solenoid HPA system in a compact, drop-in package.

High Performance HPA System

The dual-solenoid design provides independent control over the nozzle and poppet, allowing fine-tuned adjustments to dwell and air efficiency. This makes the F2 versatile across a wide range of configurations, from CQB setups to long-range builds.

Key Features

  • Drop-in replacement for Version 2 M4/AR-style AEG gearboxes
  • Dual-solenoid design for precise air control
  • Adjustable velocity and rate of fire
  • Compatible with most M4 AEG platforms
  • Operates from 45–145 PSI input pressure
  • Compatible with PolarStar FCU and trigger boards
  • Lightweight, CNC-machined aluminum construction

Performance Tuning

The F2 is capable of replicating a wide variety of rifle platforms thanks to its adjustable dwell and pressure ranges. Players can dial in performance for close-quarters limits or extend velocity for outdoor fields, all while maintaining excellent air efficiency.

Specifications

  • Engine type: Dual-solenoid HPA
  • Input pressure: 45–145 PSI
  • Operating platform: M4/AR AEGs (Version 2 gearbox)
  • Material: CNC-machined aluminum

Note: Requires an HPA tank, regulator, airline, and battery (sold separately).

Required Accessories

To complete your setup, the PolarStar F2 requires several accessories, all available at Badlands:

Frequently Asked Questions

What gearboxes does the F2 V2 fit?

The F2 V2 is designed as a drop-in replacement for Version 2 gearboxes, commonly found in M4/AR-style AEG rifles. It will not fit Version 3 or other gearbox types without modification.

What PSI range does the PolarStar F2 operate at?

The recommended input pressure range is 45–145 PSI. Performance can be tuned within this range to meet field velocity requirements.

What accessories do I need to run the F2?

In addition to the F2 engine, you will need an HPA tank, an air regulator, a line, and a battery to power the Fire Control Unit (FCU). These items are sold separately.

Does the F2 support adjustable velocity?

Yes. The dual-solenoid design allows precise adjustment of velocity and rate of fire by tuning dwell and input pressure. This makes it suitable for both CQB and outdoor field limits.

Is the F2 compatible with standard AEG magazines?

Yes. Since it uses the original AEG gearbox shell, it retains compatibility with most standard AEG magazines for M4/AR-style rifles.

 

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: 94687829018

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4.8 ★★★★★
Based on 9 reviews
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Product Reviews
C
Celeste
Los Angeles, US
★★★★★ 5
Perfect Sofa-Side Charging Hub
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
I picked this power strip mainly to use next to my sofa, where I usually charge my tablet, phone, and laptop while relaxing in the evening. Having 11 AC outlets and multiple USB ports in one place has made that corner much more organized, and I no longer have chargers scattered everywhere. The layout is well thought out. Larger plugs don't block neighboring outlets, and the flat angled plug fits nicely behind furniture. The 5-foot cord gives enough flexibility to position the strip where it's most convenient. I also like having both USB-A and USB-C ports available for smaller devices. For phones, tablets, earbuds, and similar electronics, the built-in USB ports have been very useful. For my everyday use, charging personal devices and powering small electronics, the unit has performed as expected. The overload protection switch and built-in safety features provide additional peace of mind. Overall, this has been a practical solution for adding more outlets to an older two-prong receptacle while keeping my charging area tidy and easy to access.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 2, 2026
A
Amazon Customer
Los Angeles, US
★★★★★ 1
Major Safety Red Flag! 3 Prong Outlets, 2 Prong Plug, This Does Not Provide A Grounded Connection!
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
This power strip has a compact design, a convenient outlet layout, and USB ports, so on the surface it looks useful. The patented three-row layout is clever for spacing the outlets, but that only applies to how the outlets are positioned. It does not change how the strip is actually powered or protected. The problem is the safety design. It has 11 three-prong outlets, but the wall plug itself is only two-prong. Without a ground prong, it is not grounded. The two flat prongs are hot and neutral only, so this does not provide the grounded protection that the three-prong outlets appear to suggest. That also makes the surge protection claims highly questionable to me. A real grounded surge protector should have a grounding path for excess surge energy. With only a two-prong plug, I would not trust this to provide the kind of surge protection people generally expect when plugging in electronics or grounded devices. The manual mentions surge protection, ground protection, short-circuit protection, over-current protection, over-voltage protection, over-heat protection, and UL 1363 safety standards, but I could not find any visible UL, ETL, or similar safety certification mark on the unit or paperwork. The only marking I saw was FCC, which is not the same thing as electrical safety certification. Given the two-prong plug and three-prong outlets, those protection claims feel dubious at best and misleading at worst. The USB charging is also underwhelming. The total USB output is listed as 24W, which is not much for today’s devices, especially when that power is shared across multiple ports. We frequently use 35W or higher from a single USB charger, so I would not buy this for fast or modern device charging either. Because of the two-prong plug paired with three-prong outlets, I will absolutely not use this. I do not want a power strip that makes devices appear protected or grounded when they are not. For me, this is not a small design issue. It is a serious safety concern.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
Y
Yuki WONG
San Leandro, US
★★★★★ 3
Convenient Design but Raises Some Safety Concerns
Size: 5FT, Color: White 2prong, Size: 5FT, Color: White 2prong
As other reviews have mentioned, this power strip does not provide true grounding protection. It allows devices with three-prong plugs to connect through a two-prong wall outlet, but the strip itself still relies on a two-prong connection. Because of that, I think it’s important to understand the potential safety limitations before using it, especially with higher-powered electronics. It does offer a large number of outlets and USB ports, which is convenient for older homes with limited access to modern plugs. However, considering the price, there are safer and more reliable alternatives available that may be a better long-term choice.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 24, 2026
B
Verified Purchase
Betsy N
Whiting, US
★★★★★ 5
Good Buy - 4 USB Ports (USB C) Hurray! - Fits Well In Cable Management Box - Long Flat (!!!) Cord
Size: 10 Ft, Color: White
Good Product. I have 16 x 6 x 5 cable management boxes. This is the first power strip that I have found with 4 USB ports with USB C. Because it is a single row of outlets, the power supplies for 2 laptops fit in the box. I have those, a lamp, phone, and iPAD, with 1 extra USB and 1 USB C cord plugged in. The low profile inside the larger ventilated box keeps things from overheating. It has taken a bit of adjusting to get everybody in the right place but it works great. The flat cable is smart. It fits under the corner of the rug without leaving a bump.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 15, 2023
D
Verified Purchase
David Srein
Bozeman, US
★★★★★ 5
Great for Any Inside Area
Size: 10 Ft, Color: White
I bought two of these these for my office at work and the power is unstable and there are not many outlets (work for the schools) and the building is old - built in 1977. These have done the trick and I have had no issues with my electronics.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026

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