There are 20 of these Trinity Force rails available. I'm listing them as used because they were removed from the packaging and many of them were briefly mounted on the first batch of KTAC-15s that we manufactured. We opted to mount a different model rail system and no longer need them. These rails currently retail for $110.00. These are unused and there is nothing wrong with them! Shipping for these $10.00 each. Shipping costs will be combined if more than one is purchased.