Another release from RA-Tech this week is the RA-Tech Steel Upper Receiver & Bolt Top for the WE Airsoft M4 Gas Blowback Rifle. This are new versions of the same products that they released before that are more realistic-looking and they have a version for the WE Airsoft M14 EBR GBB as well. Check how they look and function as they are installed in a RA-Tech Custom Level 3 M14 GBB.