I have a brand new Holographic Sight that I purchased from Tactical Accessories at the gun show for $80; I changed my mind and am willing to sell it for $60. These are really nice (I have one on another rifle). They have 4 different reticles, red or green dot with 3 different power settings, and come with a bunch of extra batteries. Also available is a scope mount rail that attaches to the handle of an A2 upper and still allows use of the iron sights. I mounted it to my upper but never installed the optic. Great shape; I just decided that I'll mostly use this gun with the iron sights, so no need to have extra stuff hanging off it. $10. I also have an older A2 scope mount rail that is solid but doesn't allow use of the iron sights when installed. $8. Finally, I have a few misc. parts: 3 stock m4 pistol grips and 1 A2 stock spacer - $3 each. The only things I need in trade would be a complete BCG (can add a few bucks if needed to even it out), or G17 mags, or 9mm .40S&W or .223/556 ammo. Everything located in Milwaukie / Clackamas area.