Why Are There Different Style Adapters for the Sparrow?

[weblance]

I got my stamp, and suppressor today. Its a SS Sparrow. I recently bought an adapter for my S&W 422. I ordered the "Sparrow" style adapter. I have a Ruger 22/45 LITE, and Ruger 22/45 Threaded Barrel. The adapter I ordered for the S&W 422 is different that the Ruger barrels. It goes deeper into the suppressor. They obviously are all 1/2x28. Why the difference? Does it matter?

 

[Zane]

The SS Sparrow has an o-ring that is supposed to help seal off the pistol threads from the rest of the suppressor. It also adds friction to resist turning. The extension is to engage the o-ring.

 

[wally]

You don't really need them if the barrel is threaded 1/2x28. If you want the "O-ring" feature then buy it, but no other suppressor maker does this, so IMHO the benefits are minimal. I got the adapter for my (P22 which needed it because it was not 1/2x28) and if the O-ring really does anything, I've never really noticed it.

 

[Captains1911]

To take advantage of the o-ring engagement which keeps threads on both suppressor and host clean. Also helps keep the can from loosening.