That threaded piece + cap IS indeed the 1/2 adapter. They also include the original shroud cap in the package in case you want to use the GK1 without moderator, and not have that protruding tip. So it's a matter of aesthetics in that case. If you do wanna tame the bark, you'll need to leave it as is.Guys I have a question... my gun came with a thread thingy at the end of the barrel, protected by a cap. The shop from spain (Wolfiek) claims that if I get a moderator for the GK1 (1/2 UNF) I also need to get a GK1 adapter. But do I really? What is that threading adapter I got with the GK1 if not 1/2 UNF already?
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