Quote:
Originally Posted by brendan's dad
Excellent explanation but I always thought that the threaded end and the start of the suppressor added 1/2 to 3/4 of an inch depending on design. I know it doesn't add much but it is a slight increase. I think it is called "suppressor boost"
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The threaded part of the barrel goes from the crown backwards and the suppressor threads over this.
Immediately after the crown the suppressor is considerably wider than the barrel diameter. Otherwise you could have a rough/turbulent spot if it was the same diameter where the bullet went from the real barrel into the tight part of the suppressor. And you would lose the nice crown at the end of your barrel.
So they are no different to a muzzle brake with a cover fitted essentially. And do not add extra barrel length.
In theory the slight increase in pressure around the muzzle may continue to push the bullet for a fraction of a second. But I've never seen a measurable difference over a chronograph when shooting with or without a suppressor.