Aftermarket regulator · Altaros · Premium
Altaros Regulator — Diana StormRider / Bandit + Artemis PR900W / PP800
Czech-made Altaros drop-in for the most popular dovetail-rail PCP platform. No drilling, adjustable 100-150 bar, the gold-standard upgrade for the StormRider family.
Image credit: Airgun Archery Fun
Quick take
The Altaros drop-in regulator for the Diana StormRider, Diana Bandit, Artemis PR900W and Artemis PP800. 86 orders, 100% positive. Altaros is the Czech regulator gold standard — premium internals, precise output, the upgrade of choice across these platforms. Output adjustable from 100 bar (1450 psi) to 150 bar (2175 psi). No drilling required — degas the gun, remove the fill valve, slide the regulator in with the included tool. Fits Gen 1 and Gen 2 StormRiders. Currently out of stock.
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Specifications
Key specs
| Maker | Altaros — Czech Republic |
| Compatible rifles | Diana StormRider (Gen 1 + Gen 2), Diana Bandit, Artemis PR900W, Artemis PP800 |
| Output pressure range | 100 bar (1,450 psi) to 150 bar (2,175 psi) — adjustable |
| Install method | Drop-in — no drilling. Degas, remove fill valve, slide regulator in with included tool |
| Included | Regulator, mounting rod, O-rings |
| Companion part | Diana/Artemis fill valve + gauge assembly recommended to retain pressure reading |
| Buyer rating | 100% positive on 86 orders |
| Stock | Out of stock at time of writing — restocks frequently |
The Hunt & Live take
Why this regulator earns the pick
Altaros is the Czech regulator brand that built its reputation on premium internals for high-end European PCPs and earned a second reputation engineering drop-in kits for Chinese platforms like the StormRider family. They’re the gold standard across most modern PCPs — the upgrade you make once and don’t think about again.
The drop-in install is the structural advantage. The StormRider, Bandit, PR900W and PP800 all share the same reservoir architecture: a tube with a removable fill valve on one end. To install this regulator, you degas the rifle, unscrew the fill valve, slide the Altaros in with the included threaded rod, and reinstall the valve. No drilling, no machining, no modification to the rifle. Verified buyer review on the partner page: “My Bandit is so much more consistent with this regulator installed. Quick and simple installation too.”
The 100-150 bar output range is the right window for these rifles. The StormRider has a 250 bar max fill; setting the regulator to 130-140 bar gives you roughly 50-60 shots of identical velocity per fill versus the 20-30 shot sweet spot of the stock unregulated valve.
What it pairs with
- Diana StormRider Gen 2 — the most popular host rifle for this regulator
- Diana Bandit — same regulator covers the pistol variant
- Artemis PR900W — the regulated pumped version benefits the most from the Altaros
- Artemis PP800 — pistol variant
- Diana / Artemis fill valve + gauge assembly — companion upgrade so you can still see fill pressure after install
Honest trade-offs
Currently out of stock. Altaros production is small-batch from Czech Republic and stock cycles. Email Wes at support@airgunarcheryfun.ca for ETA, or use the Lane regulator kit or Snowpeak Stormrider/Bandit regulator as in-stock alternatives.
You’ll need the fill valve / gauge assembly too. Installing the regulator covers the original gauge port. Budget the companion part into the upgrade.
30-60 minutes of work for a first-time install. Not a “screw it in and done” job — there’s degassing, fill valve removal, regulator insertion, O-ring management, and reassembly. Verify your StormRider isn’t under warranty (or you’re OK voiding it) before opening it up.
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