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Uploaded on Oct 12, 2010
Three ar-15's. First is unsuppressed, second is 20" Hbar with K baffle silencer, third is 16" barrel with step cone baffle silencer. The sonic boom echoing is obvious. The shooters report that the step cone baffle was a bit higher in pitch and slightly louder. I was hoping that my step cone silencer would be less noisey than the K-baffle one, but the greater noise might be due to the shorter barrel.