KA Tech MAC Polarstar Demon Slayer AR8-4 HPA M4
Up to 45 business days
Production starts the moment you order. Cancel any time before it begins for a full refund — no fee.
Every KA Tech rifle is built on internals and tuning we’ve spent the last four years perfecting. Our performance packages are the industry standard everyone else is chasing — if you want something that’s going to outperform everything else on the field, this is it.
The KA Tech MAC Demon Slayer is a prototype build on the AR8 platform, and currently the highest-performance rifle KA Tech has built to date. Every part of this rifle was chosen to shave weight and add speed — from its dual folding stock to its aggressive javelin rail.
This is the only rifle in the KA Tech fleet with a direct-thread hop-up unit mounted straight to the engine — no adapter, no extra length, just a more direct path from engine to barrel. Combined with a front cylinder attachment and a weaved, filtered Amped airline, this build is built to be extremely lightweight without sacrificing an ounce of performance.
Available with the standard outer barrel configuration.
Colors, CNC design, and specific requests can always be customized — just reach out.
Buying a KA Tech rifle isn’t where our relationship ends — it’s where it starts. Think of us as the best HPA technicians in the country, in your pocket, 24/7. Want to change your FCU tune? Swap parts? God forbid something goes wrong? We want to be the first call you make for anything HPA-related. When you buy a KA Tech rifle, you’re not just getting the best build on the field — you’ve got a full tech team behind every move you make.