This model set turns an Action Army AAP-01 into a M6C SOCOM from Halo. The pieces attach to the AAP-01 with only a couple of bolts and no modifications to the pistol itself are required. The handguard slides and snaps into place around the grip for a secure fit.
In addition to the printed pieces you will need one M5x10mm bolt and two M3x12mm bolt. The two handguard pieces should be glued or welded together.
This set includes four models in .stl format.
Don’t have a 3D printer? A set of prints and hardware are available here.