Sig MPX K

[Screagle]

https://www.calguns.net/caawid/hgflowchart.pdf

[Jonath]

Pin and weld?

[Screagle]

[SkyHawk]

A maglocked pistol with a mag capacity of less than 11rd can have a threaded barrel. Check out all the AR and AK pistol for sale with threaded barrels.

Note in the flowchart you linked that the question about a threaded barrel is SKIPPED if the answer is 'No' to 'does it have a removable magazine'.

[Screagle]

Thank you!