MK23/SSX303/SSX23 Shotgun Shell HPA Adapter - 2026 Edition - PLUG AND PLAY

The definitive MK23 HPA Adapter. We’ve replicated a MK23 magazine, and adapted it to take HPA, fed by 30 round shotgun shells. Massively improved ergonomics and magazine catch feel (compared to our previous generation of MK23 shotgun shell adapters). CNC Aluminium magazine baseplate High internal volume for good FPS/PSI. Two small grub screws are fitted to the adapters mag catch area, you can loosen these to reduce the distance from adapter to nozzle, improving air-seal and FPS. If you want to get higher FPS, run a tighter barrel, a higher flow nozzle (SSX23/303 users), or a stronger hammer spring. For Clone/SSX Users We include small rectangular gas router shims which can be placed under your feedlips to move the gas router up higher towards the nozzle to improve fps. To remove your feed lips, first remove the two screws at the front of the lips, and then remove the pin at the rear of the lips.