Crush Washer not included.
Threads are clean and smooth, machining looks good. The is a great economical muzzle device for 9mm 1/2-36 barrels. The only reason I did not give it 5 stars is, the description does not mention any washer or compatibility of needed washer. Most muzzle devices ship with a washer and if not, explicitly state so. I didn't really think about it until it arrived and I noticed there was not a washer. Looks like a 7/8" outside diameter and 9/16" inside diameter....approximately... Would be nice if Brownells updated description with information about the required washer that needs to be purchased separately.
