Best drop in free float - Daniel Defense AR-15 Omega Rail

This is the best drop-in free float rail you can buy for any carbine length ar15 with a fixed front sight that you don't want to remove. No gunsmithing, no cutting or removal of anything except your old plastic handguard. Almost every other free float rail out there requires the removal of the delta ring and underlying components, though recently I did see some Troy rails available now with the same no gunsmithing claims.

It's too bad DD decided to discontinue this item. Hopefully they got an improved version, e.g. rails extended a few more inches to cover the A2 front sight, such as seen with the Samson Star series rails. But Samsons' need gunsmithing.