Refurbished
King Arms PDW M4 HPA - KA Tech Airsoft - KA Tech Entry Level HPA Rifle
King Arms PDW M4 HPA - KA Tech Airsoft - KA Tech Entry Level HPA Rifle
King Arms PDW M4 HPA - KA Tech Airsoft - KA Tech Entry Level HPA Rifle
King Arms PDW M4 HPA - KA Tech Airsoft - KA Tech Entry Level HPA Rifle

King Arms PDW M4 HPA

$400.00
HPA Engine

Which Polarstar HPA Engine Should You Choose?

All FPS figures are measured with our standard 180mm 6.02 inner barrel and KA Tech's tuned hop-up, bucking, and regulator combination.

Kythera

250–400 FPS · 350 FPS @ ~100 PSI · Semi-auto only

Purely mechanical — no electronics, no full-auto. Just air, BBs, and go, with a realistic trigger pull, break, and reset. Great for training, Milsim, or fields that are hesitant about HPA rifles.

Jack

250–410 FPS · 350 FPS @ ~100 PSI · Up to 50 RPS full-auto

Our entry-level HPA engine. Fast semi-auto with real full-auto capability.

F2

250–440 FPS · 350 FPS @ ~100 PSI · Up to 85 RPS full-auto

The best overall HPA engine on the market — the strongest combination of air efficiency, accuracy, range, consistency, and tune-ability.

Fusion Engine

250–500 FPS · 350 FPS @ ~55 PSI · Up to 75 RPS full-auto

The powerhouse. A clicky tactical trigger board delivers crisp trigger response for players who want the most power out of their rifle.

Our recommendation: First time going HPA? Go with the Fusion Engine. If you're committing real money to get into HPA, go all the way the first time so you're not stuck upgrading piece by piece down the road.
Backed by KA Tech Warranty
HPA Specialists Since 2022
Description

The King Arms PDW M4 HPA is part of the KA Tech Entry Level HPA line, giving players an affordable way to get into HPA without jumping straight into a full custom build. This rifle is professionally built by KA Tech Airsoft using a brand new HPA engine installed into a refurbished King Arms PDW M4 body.

This compact PDW-style platform is a great choice for CQB, speedsoft, and lightweight field play. It keeps the feel of a small M4 while giving you the consistency and tunability that HPA players look for.

If you would like to upgrade the hop-up, bucking, inner barrel, trigger, or IGL, we can do that before shipping the rifle.

  • Part of the KA Tech Entry Level HPA rifle line
  • Professionally built with a brand new HPA engine
  • Refurbished King Arms PDW M4 body
  • Compact M4/PDW layout
  • Great affordable starter HPA rifle
  • All rifles come as shown
  • FCU, battery, airtank, regulator, airline, and magazines are sold separately

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.