Polarstar 6061 Aluminum Gas Stock Adapter for Elite Force/CYMA, Tokyo Marui, and Galaxy MP5K

An MP5K without a stock is a great CQB tool. Add one, and it's a carbine with better follow-through and something to shoulder between shots. The Polarstar Gas Stock Adapter does the conversion, and it fits the three MP5K platforms most players run: Elite Force/CYMA, Tokyo Marui, and Galaxy.

Machined from 6061 aluminum, so it's the kind of solid fit you want on something that's taking every blowback cycle through the receiver. No polymer flex, no play working into it during a mag change. The adapter mounts to the rear of your MP5K and gives you a proper stock interface — turn a compact sidearm into a shouldered carbine in the time it takes to grab an Allen key.

Why it matters. An MP5K is short by design, which is great for tight rooms and bad for follow-up shots when there's actual distance involved. A stock lets you control the blowback recoil, sight down the iron sights instead of hovering the gun at arm's length, and carry it slung instead of in a holster. If you play mixed indoor/outdoor games, run your MP5K as a DMR backup, or just want it to feel less like a pistol you carry like a rifle, the adapter closes that gap.

This is the adapter only. You'll need a compatible stock — what you use depends on your platform and whether you want a fixed or collapsible setup. Check compatibility with your specific MP5K model before ordering, since rear mount points can vary between manufacturers.

What's in the box. Gas stock adapter. That's it — stock and tools are not included.