Currently with 18×1 mm Metric Thread. HOWEVER I do have thread conversion sleeves in stock. These drop / convert to whatever fitting you require in Imperial or Metric thread.
182 mm long and 42 mm diameter it extends the overal length of a barrel by 100 mm, adding approx. 275 gramms.
ANY and ALL Pre-used Sound Moderators I have should offer up perfectly acceptable performances. Certainly comparable to the equivalent model brand new. Given they are very likely to already be ‘carbonised’ internally there is every chance they will actually increase effectiveness. As with anything not brand new there is a chance they may well not last as long. However this IS reflected in the price. In reality, unless you are regularly spending hours on a range, there should be way over enough ‘life’ still there for the average shot.
The ONLY way to get maximum longevity is to dig that bit deeper and buy new. Happy to order those in where needed so just ask if you prefer.