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6/11/2009 11:17:29 PM EDT
I have a Stag Model 3 and want to replace the gas block with a 4 rail gas block.

My qusetion is how hard would it be for me to replace it without messing anything up?

I've never done anything like this and I worry I might mess something up like the firing cycle or something. The reason I want to replace it is to place a sling mount on it, right now there is a 1 rail block with my BUIS on it so I need another rail for the sling. I really don't want to replace my handguard with a rail handguard unless I have to.
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