Product Description
PolarStar Hardware Kit With 3D Printed Split V2 Gearbox
Build your own PolarStar HPA gearbox lower with this hardware kit and 3D printed split V2 gearbox shell. We print the shell and clean it up, so it arrives with no leftover filament or support material. It is paired with the PolarStar hardware you need to finish the job.
This is a do it yourself kit. The shell arrives without the heat set inserts installed. You will heat set the inserts into the printed plastic with a soldering iron or insert tool, drill out the grip screw pilot holes with the included #23 drill bit, and complete the install yourself. If you like hands on builds and have done a bit of plastic work or small engine installs, it is a great way into a PolarStar HPA gearbox.
The hardware covers the key fasteners and parts: stainless M3 and M2 button head screws for the clamshell and switchboard mount, nine heat set inserts (eight M3 and one M2), a square M5 nut for the buffer tube screw, a compression spring for the pusher piece that helps keep the engine seated forward, and two 5 inch bullet valve leads for HPA line routing.
The design is based on PolarStar’s own split V2 gearbox lower, so the kit matches the hardware PolarStar specified for the design. The HPA engine, Direct Attachment Front Cylinder and Hop Up Thing are sold separately as add-ons. For a full Direct Attach gearbox build you will also need a selector plate and a trigger and safety assembly with springs. We have added these as options above so you can get everything you need all right here on this page if you choose!
Features
- 3D printed split V2 gearbox shell, cleaned of leftover filament
- Do it yourself install: heat set the inserts and drill the grip screw pilot holes
- Nine heat set inserts included (eight M3 and one M2)
- Stainless M3 x 15mm and M2 x 4mm button head screws
- Square M5 nut for the buffer tube screw
- #23 HSS drill bit included for the grip screw pilot holes
- Compression spring for the pusher piece, helps keep the engine seated forward
- Two 5" bullet valve leads for HPA line routing
- Built around PolarStar’s own split V2 gearbox lower design
Specifications
- Printed gearbox: 3D printed split V2 gearbox shell, cleaned of leftover filament support. Inserts are not installed.
- Hardware included:
- 4x BHSC screw, M3 x 15mm, stainless steel (clamshell assembly)
- 1x BHSC screw, M2 x 4mm, stainless steel (switchboard mount)
- 8x heat set insert, M3 (clamshell and grip screw)
- 1x heat set insert, M2 (switchboard)
- 1x square nut, M5 (buffer tube screw)
- 1x #23 HSS drill bit (grip screw pilot holes)
- 1x compression spring (pusher piece)
- 2x bullet valve lead, 5"
- Design: PolarStar split V2 gearbox lower
- Install: Customer installs the inserts, drills the grip screw pilot holes and completes the build
- Available Add-Ons: HPA engine, Direct Attachment Front Cylinder, Hop Up Thing
- Also needed for a full Direct Attach build: Selector plate, trigger and safety assembly with springs
- Manufacturer: PolarStar (hardware and design)
More About PolarStar and Why Amped Airsoft Carries Them:
PolarStar Precision Airsoft was formed in January 2009 to build high-quality, precision-manufactured airsoft components designed for performance and longevity. After releasing its patented Fusion Engine HPA system in 2011, the company shifted its focus from upgrade parts for existing platforms to HPA systems and accessories meant to replace aging AEG technology. Amped Airsoft carries PolarStar because its engines, conversion kits, and parts are among the most proven options for players moving to HPA.
To view our full selection of PolarStar products: Click Here