A quick presentation of the Arcturus AR15 Lite Karambit (AT-NY05) AEG that is available at Taiwan Gun... "Replica from the newest series Arcturus LITE. Upper and lower receivers made of durable nylon. Thanks to the nylon, bodyweight, and price were significantly reduced. Replica did not lose its strength due to the socket of the receiver extension tube and a barrel socket with a thread for the handguard fastening ring is reinforced with a metal threaded sleeve."