Kross Airsoft Design MK23 Extended Magazine

Every MK23 owner knows the pain of the 28-round mag. Two-and-a-half mid-game reloads later, the gun is empty and you're stuck juggling small magazines from your rig. The KAD MK23 Extended Magazine doubles the capacity to 60 rounds — turning the MK23 from a frustrating low-cap pistol into a viable skirmish-length feed source.

Six packages cover both gas and HPA users at every comfort level. Adapter Only versions (gas or HPA) ship the kit and you fit it to your own donor mag. With Mag versions come pre-built around a fresh donor magazine. Send Us Your Magazine versions take your existing mag, fit the conversion, and return it ready to use. Pick gas or HPA depending on what your gun runs.

Important compatibility note: ASG magazines manufactured after 2021 don't align correctly with this extension. TM mags work without issue, as do older ASG mags.

Why the rear gas valve placement matters

KAD redesigned the gas fill valve to sit at the rear of the extension rather than the bottom. Two reasons: first, it's faster to refill in the heat of a skirmish — you don't have to invert the mag to find the valve. Second, mud. Bottom-fill valves clog with debris when you're crawling or shooting prone; rear-fill valves stay clean. Small change, big practical difference for any MK23 sniper actually using the gun in the field.