This model set turns an Action Army AAP-01 into a M6C from Halo. The pieces attach to the AAP-01 with only a few bolts and no modifications to the pistol itself are required (though you can cut the inner barrel short to be flush with the front). The handguard slides and snaps into place around the grip for a secure fit. The optional magazine base plate also slides on in place of the original base plate.
In addition to the printed pieces you will need one M5x10mm bolt and two M3x12mm bolts. The two handguard pieces should be glued or welded together.
This set includes five models in .stl format.