Wxm, I'm not a Bsa fan, but the ultra fitted the bill for the nipper, so took a slight chance. But so far its really good, touch wood. As for the vc silencer, its basically the same as Hw internals, just not as quiet again, but quieter than that decimator. I don't know how anyone can say its quiet lol tried on a tuned .177 19" barrel s type, and a std ultra with 12" barrel, both were fairly loud like..then put Hw on s type, that's all u could hear is minimal action noise more or less