I've also got the one that replaces the dust cover with a railed cover. The high rise rail lets you use the iron sights as well. My concern is whether or not there will be any issues with drifting over time. I am also reluctant to get used to a red dot or holosight. I'm thinking long tern SHTF. Batteries may become scarce and then a small tactical scope or just iron sights may be the only choices. I have a red dot but I'm thinking of either selling it or trying to trade someone for a tac scope.
