KA Tech Metal 10” Competition Polarstar F2 HPA M4

$1,100.00
Polarstar 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
Trade in anytime — up to 70% back in store credit
3-month labor warranty — you only pay for parts
Description

KA Tech Airsoft’s Full Metal 10” Competition Rifle is built for players who want a rifle that feels substantial, durable, and competition-ready. This build combines a rugged full metal platform with your choice of HPA engine, then we finish it with the best possible hop-up, bucking, and inner barrel combination for that specific setup to deliver maximum range, accuracy, and consistency.

This is not an off-the-shelf rifle with generic internals. Every build is carefully configured to get the most out of its engine choice, giving you a rifle that performs at the highest level on the field. Whether your priority is trigger response, air efficiency, tunability, or pure performance, this platform is designed to outperform.

The full metal construction gives this rifle a beefy, realistic feel in the hands while maintaining the durability needed for hard use. If you want a rifle that feels solid, shoots laser straight, and is built with no compromises, this is it.

What sets this build apart:

  • Full metal construction for a realistic, durable, heavyweight feel
  • Your choice of engine to match your playstyle and performance goals
  • Hand-selected hop-up, bucking, and inner barrel setup for maximum range and accuracy
  • Tuned to deliver elite consistency and on-field performance
  • Built to outperform standard production rifles

Want to change the length, attachments, or accents colors? Everything is customizable. Reach out to us and we'll make it happen!!

Want something lighter?
If you want the same performance-focused build in a lighter weight package, check out the lightweight version here

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.