Bet you can't guess what this Thing is for. It's a hop up — or a paperweight, or maybe a very expensive fidget spinner — but we're pretty sure it's a hop up. Actually, it's a 6061 T6 Aircraft Aluminum hop up, machined in-house at PolarStar to ±0.002" tolerances. No cast parts, no off-spec slop, no YouTuber paid to tell you it'll magically double your range.
We designed this with a zero-BS focus on the stuff that actually matters: consistency, fitment, and air-seal. If your hop up is snug and your nozzle is centered, your gun shoots straight. It's not rocket science — it's just good engineering.
TDC Slider System
The heart of this Thing is our TDC (Top Dead Center) slider system. Unlike old-school sliders that shift if you sneeze on them, our TDC arm applies perfectly vertical pressure for a consistent flight path every shot. The modular design lets you tune fitment for both AEG and HPA builds.
Specs
- Compatibility: Standard V2 M4/M16 models (AEG and HPA)
- Material: 100% Machined 6061 T6 Aluminum
- Adjustment: TDC Slider System (3×4mm nub compatible)
- Color: Batch 01 — Medical Metal Gray
- Manufacturing: Made in the USA
What's in the Box
The hop up Thing and everything you need to make it work: 0.305" gearbox lip (standard for most AEGs), 3×4mm round nub, ARO (Axel Retaining O-Ring) Tool, 5 shimming O-rings, and a molded barrel clip.
This product is excluded from all discounts.
Parts and accessories ship within 7 business days. Custom HPA rifle builds take up to 45 business days (often less). Need it sooner? Contact us to check current stock.
All sales on parts and accessories are final once shipped. Defective or damaged items are covered under the KA Tech Warranty.