This is a SD Tactical 8" tube with Totality Industries radial cones. I had a SD Tactical threaded muzzle break on it. The whole build cost about $300. I also tried it on my 5.56 AR-15 and it worked fine. The internals are all titanium except the first two baffles which are stainless steel. I think there are about 9 baffles. Definitely hearing safe.
