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Old December 18, 2019, 05:15 PM   #5
Senior Member
Join Date: November 4, 2013
Location: Western slope of Colorado
Posts: 3,534
I have a few of both, 556 and 300blk SBR’s. I have in the past had a 7.5” 556. I will never own another. Just ridiculous in terms of blast and flash...horrible for a useful rifle.

The shortest i will go on a 556 is 10.5” and 12.5” is better.

My 300blk SBR is a 9.5” AAC gun, but it wears a Gemtech can 99.9% of the time.
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