8mm OD pipe and printed sleeve which is 12mm OD, instead of printed sleeve, you can use 12mm OD 8mm ID carbon pipe
12mm OD 6mm ID pipe
So yes, 16mm OD is too big, and some people claim it works with smoothbore pipe rather than riffled. Even the designer is using smoothbore. Make sure it’s legal to use smoothbore in your country.
Nag is using one of two options:
So yes, 16mm OD is too big, and some people claim it works with smoothbore pipe rather than riffled. Even the designer is using smoothbore. Make sure it’s legal to use smoothbore in your country.