I've one of these too in 24", but mine is around 10 years old, not that it looks it... but had to have it thread cut.Is it brand new? Didn't realise they were doing this length threaded.
I use a stalon on mine and its very impressive
+1 evolution absolutely fantastic sound suppression & couldn't wish to deal with a better company.I use a 20cal specific "Wildcat". Ideal.