Bought it as an M16a4 for $315 on Evike and did a ton of modifications to it. I replaced the fixed stock with a buffer tube and QD plate with a Magpul stock. Used Daniel Defense pistol grip, new MLOK handguard, KAC flashhider, Magpul MBUS PRO front sight, MI or KAC rear peep sight, and MR556 charging handle.The ACOG is super super fake and does not have 4x zoom it is for cosmetic purposes mostly. It has a green dot that is solar powered and can be zeroed in. The PEQ box up front is also ONLY for cosmetic purposes. It is a plastic box with no capabilities whatsoever. I’ve fielded the gun once before and did not enjoy it as I only have 1 mag for it and it was too cold to use green gas effectively. If you are going to be playing in winter weather or anything below 30 degrees F, use red gas. Only issue is the spot to put in trigger guard pins on the lower receiver is broken, so you cannot effectively install a trigger guard, which is why I have a pistol grip with a built in trigger guard. THIS M16 USES A WA (WESTERN ARMS) GAS SYSTEM, therefore it will only work with select buffer tubes, bolt carriers, magazines, and triggers. WILL WORK WITH GHK BRAND MAGS. Will trade for a gas AK of any kind. Always wanted one even if it doesn’t have working gas seal or mags.