One Shot Tactical has recently received some Daniel Defense Mk18 rails in their most recent shipment from Daneil Defense. The Mk18 Rail Interface System is apart of the U.S. SOCOM’s SOPMOD Block 2 weapons system project currently in wide use with American Special Forces. The rail works excellently on SBR’s in the 10.3″ – 11.5″ range and provides a sleek light free float rail for your AR platform.