Thread: Suppressor-over barrel or barrel forward

Hi,
Regarding the rear bush touching debate: we are fitting about 1500 of our suppressors per year on customers rifles( and not counting the 3500 other suppressor we sell to shops and public who get them fitted by their own gunsmiths).
We would probably investigate a dozen accuracy issues a year. And in most cases ,it is the rear bush being too tight around the barrel which causes the problem. I can not speak for other manufacturers designs, but that is what we found works the best with our over barrel suppressors.
Barrel outside countour concentricity to bore concentricity goes from excellent ( tikka,Sako....) to shocking (Asian productions and certain American ones....) , so much that we have seen up to 1.8 mm of outside concentricity. In those cases we set up and thread the barrel concentric to the bore, with a reasonably tight tolerance thread, boring out the rear bush till we do not have any more stress applied sideways by the rear of the suppressor onto the side of the barrel ounce screwed on. We have not found any negative effects on accuracy proceeding that way.
As to rattling issues against the barrel with the slightly loose rear bush, again our suppressors due to their design construction are less noisy than some manufacturers single tube overbarrel design, and we don't notice nor have reports of those issues with our products.