For sale is a new Unity Fast Riser and Unity Fast Flip To Center Magnifier Mount, specifically the Omni , I purchased each new for about 350, asking $250 obo.

Next is a set of the Magpul MBUS Pro 45 degree offset irons, sold as a set $150

Last is a SilencerCo ASR 5.56 Flash Hider Suppressor Mount $50