Here’s a set of prints that can turn an Action Army AAP-01 into a M6G from Halo. This set includes six 3D printed pieces and the hardware needed to mount it to an AAP-01.
The inner barrel will be exposed in front of the outer barrel and can be cut short to fit. The original trigger guard can also be cut off to complete the look. The slide is attached with a single M5 bolt and blows back when firing.
*This set does not come with an AAP-01.
Want to print the pieces yourself? 3D models are available here.