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Old April 15th, 2009, 23:24   #9
Qlong's Avatar
Join Date: Jun 2007
Location: Scarborough, Ontario
The gas tube is purely cosmetic, most if not all iron sights will have a slot for the gastube to insert into.

If you still want the iron sight, but you want a rail system, get a RAS. It couples in between the delta ring and your hand guard retainer.

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