"Enhance your M4 build with this precision-engineered 3D printed upper and handguard set. Crafted with meticulous detail, these components offer durability and a sleek design for your Airsoft gun customization needs." INCLUDES: 1x Upper Receiver,1x Hand guard, 2x rails for hand-guard, 1x rail for Upper Receiver, 1x hand-guard screw piece, 1x End-cap OFFER DIFFERENT MATERIALS (RAILS AND SCREW PIECE FOR HAND-GUARD ARE PRINTED OUT OF PC) END CAP IS PRINTED PLA COMPATIBILITY: G&G LOWER (WHICH IS IN PIC ABOVE) & OTHER COMPATIBLE M4/M16 SERIES AIRSOFT AEG RIFLES 1-2 PROCESSING (MADE TO ORDER)