I initially put on my KAC mini can and it was quite loud. I ran the gun with and without a can and the brass ejected at 3:30 with the only difference being the force at which it was ejected. Both were fine but slightly sluggish without a can. I expect it is properly gassed for a hot 556 ammo. I ran the gun but I had to wear ears because it was so loud.
I put the small can back on the 16 inch gun and placed my Sig 556 DT can and it ran just fine and was tolerable without ears. It was a good move and I'm satisfied with how it is running. Finding the right combination is "The Way". If you have a gun, can, buffer running just right, share.
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