Introducing the MK23 M-Series adapters. We've fully printed the gas magazine for this adapter, maintaining high air volume, adding modularity, improving ease of assembly, and reducing weight massively! The way we see it, this is the ultimate solution to HPA'ing your MK23 (if you don't want to run shotgun shells that is!)

This item is the modular base for the adapter. To build it up, you need feed lips, gas router and valve from a donor magazine, or you can opt for a prebuilt base by purchasing this item 

You'll also need one of the 'magwell' bases, which are available here