KA Tech MP5K Polarstars Jack HPA Foldable Stock
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 MP5K is the CQB beast of the lineup — compact, ergonomic, and built to feel as realistic as it looks. If you’re clearing rooms and running tight corners, this is the rifle you want in your hands.
This rifle is built with top-tier internals and premium external components to give players a true performance advantage — fully kitted out and ready to run straight out of the box.
- Full metal MP5K body
- Polarstar Jack HPA engine with Safe, Semi, and Full-Auto firing modes
- OEM Hopup Unit with centered nub
- Maple Leaf Super Macron 60 bucking
- Maple Leaf 6.02 precision inner barrel
- Fully tuned FCU, wired to the grip
- Polymer foldable stock — rock solid, no wobble
- Custom Picatinny mounts for flashlight and optic
- Includes M300U Surefire flashlight with soft pressure pad
- Includes 556 EOTech-style red/green holographic optic
- Includes suppressor
Attachment loadout 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.