This is an ultra high detail AR-15, the black rifle, modeled by Chris Plush of CG Masters. The model does not include any interior mechanisms but everything seen is close to 100% accurate. You can see full-res renders below:
This is AMAZING! Great job! Can't wait to see what you make next! -The Inventor
Thank you for the model I really appreciate it, in response I will showcase your model for display in a live competition for best K/D Ratio on Battlefield 3 Tournament discussion LINK: https://plus.google.com/u/0/communities/111766357546860064788 LIVE Tournament LINK: http://www.twitch.tv/thekennel