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Old May 12, 2010, 05:34 PM   #5
Senior Member
Join Date: February 8, 2008
Location: Denver, CO
Posts: 1,925
It depends on which rail you use.

If you take a dremel tool or other cutter to your front sight base and cut the bayonet lug and sling swivel off, you have a low profile gas block which should fit under 95% or more of longer rail systems.

I run a LaRue 10" system on a carbine, which has the gas block 7" away from the receiver. No issues, and I can use whatever aftermarket sights I want...

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