GHK Colt Licensed M4A1 SOPMOD Block 2 Gas Blowback Airsoft Rifle w/ EMG Daniel Defense RISII Rail by Cybergun (Length: 10.3" Mk18 MOD.1) Only been shot to be tested. I never used it. I purchased it and just never used it. Asking for 575 or OBO. I'm sorry, I'm not looking for any trades. Willing to ship or meet locally.