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Gemtech 5.56 SBC, CAT M4 Tool

After using the Gemtech 5.56 SBC for a few thousand rounds of not cleaning I started getting gas in my eyes and decided to clean the SBC as well as my Aero SBR.  

I have been using the CAT M4 AR15 tool for a while now, at least a few years.  I may do a mini review but it is pretty simple and it's use is to the point.

As you can see, cleans off carbon in a snap.  More photos below...