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Old November 8, 2012, 07:37 PM   #6
Crow Hunter
Senior Member
Join Date: January 27, 2012
Posts: 1,078
If it's a SIG 556, it uses STANAG (AR-15) type mags
I figured as much but when he said clips that hold them together, for some reason I read that as little nubs like the 550 mags.

I knew they had made a run of Sig 556 rifles with 550 lowers. Thought that might have been what he was talking about.
I am no longer participating in gun forums.

Good luck.
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