This sucker is brand new in the packaging. I took it out once to fondle it, then put it back. Never mounted. This is the rail mount, not gas block mount. It has the regular FSP and is HK style. Cool sight and I wanted to keep it but I am wanting other stuff right now. Price is $84 on the west side of hillsburrito buyer pays shipping if it is going elsewhere. No trades, don't even ask. looks just like this here: Sight is Sold Pending funds.