Daniel Defense Omega rail doesn't require removal of the front sight or delta ring assembly. They are nice and light, solid, and free float. The only downside is they are spendy. $250 or so for a carbine length rail.
June 10, 2009, 12:30 AM
I have the MI, and it's worked well for me, but another options is the Tri-Rail from SOG Armory -
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