This is a flared mag well for the Modulus Mk2 Recon second version. It speeds up your reload by allowing you to be a bit less accurate when you go to insert the magazine. May not be compatible with all magazines (such as drums). BE SURE TO TAKE CARE WHEN PLACING FLAT ON BUILDPLATE! The Mk2 Recon is not flat.
Print then glue with epoxy or Gorilla Glue (recommended for PLA)
Featured on my Lightweight Loadout Mk2 Recon as seen on Make.Test.Battle