[Tokyo Marui] Mac 10 AEP SMG Pistol[Silencer]

This gun needs a minor adjustment. I bought one at a store in the US, a few months later, auto shoot did not work. I sent it back to the store, they fixed it. A short while later, both auto and semi broke down. Good thing that the store sent me a brand new replacement. In the meantime, I bought another gun at sixmm.com, now I have 2. I read the reviews about this Mac 10, it was released about 15 years ago, and since then, it seems like Tokyo Marui never made any significant improved enhancement. I wish they would make an upgrade in the future.