PolarStar Hop Up Thing

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.