9mm barrels, whether ar or ak, are measured different because no barrel extension.
That’s exactly the one I bought earlier this week. It was the longest of the USMG options, and I wanted it clearly 16”+ even allowing for a margin of error! 
What I am liking about this particular Muzzle device is that it do not look like a suppressor, at least to me, so hopefully I would avoid have to present paperwork for an SBR or an actual “can”. 
Interesting…. No, I need to go research this.
Thank you 
I have never been asked for proof of tax stamp.
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Regarding an AR pistol that I once owned, I was asked if it was an SBR (which I took as an opener for, “do you have your paperwork?”).
Like I’ve said, there are enough FLETC visitors & members at the range that the potential for inquiry is high enough that one could expect to be questioned over potential NFA items.
I have enough issues in my life already and there’s no room on my plate for “Imperial entanglements”. 
The USMG barrel extension arrived this afternoon. Threaded all the way onto the AK-V barrel, the dowel (inserted as specified) measures at 16.5”.
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Awesome to hear! I have one on order to (just in case). 
Neither have I and we shoot with the sheriffs department on the range occasionally. Most of them just want to bump fire the AK-V…
Is the usmg barrel extension aluminium? Will that be a problem pin and welding onto steel?
I do know from welding experience long, long ago that combining different types of metals doesn’t work so well, however what Mr/Sir @drwildbob has stated sounds very doable. Depending on the cost of a potential barrel change, I very well may be going w/the USMG extension. I would prefer a 16" threaded barrel, but if it’s simply too much trouble & cost…. A blind pin & weld it is.
Thank you for the information.
I think I’ll work on finding steel extension though.
You need to tig weld aluminum over top of pin.
An extension would be alot heavier in steel but you could high temp silver solder it on with no pin. High temp silver solder 80pa is high temp
I found this Steel 6"
That’s just a threaded tube…I’m working on finding a quality setup…I’ll keep you posted. Thanks.
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My AK-V measures 9.75" taking into account for the threads. The barrel extension should be 7" .
Once it’s a 16 inch barrel it’s a rifle
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Drwildbob:
What exactly is the product you purchased from USMG that makes you compliant?
Thank you
For anyone considering a USMG barrel extension to lengthen an AK-V barrel via a pin & weld option…
I ordered the [taken directly from the USMG site]…
“Our New Vented Stone Krusher Flat Spiked extension for the AR15, Nak 9, & other barrels in 1/2x28 threads. For door breach, defense and barrel counterbalance. This machined aluminum vented extension is finished in flat black anodize, 7.5 inches in length, 1.5” in diameter and weighs about 9 ounces. May Be used to reach compliant barrel length if pinned and welded. *** This fake suppressor will add length to the barrel. All rifles and pistols with 1/2x28 barrel threads. For .22LR, 223, 5.56, 9mm up to .45 acp."
This will hopefully provide all pertinent information about this “muzzle device” product.
This tube is indeed 7.5" in length.
This does NOT include a predrilled hole for a pin & weld, so you (or your gunsmith) will have to drill the hole yourself. There is approximately 1/8" of space to drill a hole. This makes me think it would be a 1/16" hole drilled all of the way through to be double pin & welded on opposite ends because that seems to be very small for a pin? This is something that I would have to trust to the judgement and experience of a competent gunsmith! It has become my understanding that a typical pin rod is 1/8", so maybe the hole might need to be drilled closer to the outer diameter of the fake suppressor to affect a proper pin & weld?
[It goes w/out saying, I’m not suggesting to p&w an aluminum rod all of the way through the barrel. ].
I was expecting at least 1/4" of space to work with, but this is what it is and I have to work with what is available.
I was expecting this to more hollow, like a sound redirection tube or a barrel shroud (for weight considerations) but this appears to be solid aluminum with a hole bored down the center and threaded on one end.
Will this be a viable option…. I can’t say for certain. I am collecting resources for this project while I can (and while they might be available) so I will not be caught in a lurch as time dwindles on any ruling deadlines. I am still going to wait to see if PSA will offer any solutions, such as a barrel replacement, and I am still open to any other options that one of us might find as well, but with this being one of the currently available options, I wanted to help anyone else considering a USMG extension as an option with this data for them to add to their options as well.
I know that many [if not all] of us are looking for the most cost effective solution to this problematic situation that seems to have been created purposefully as an attempt to create/expand an illegal firearms registry as well as a “justified” excuse for creating criminals out of law abiding individuals.
Honestly, I am a little disappointed in that I was expecting more of an open-ended, lighter tube-like option (something more akin to a sound redirection tube) which this product has not turned out to be. This has now become a last-ditch, emergency option to creating a 16+" barrel for an AK-V (so that it would not be considered an SBR).
With this configuration, the overall barrel length would now be 16.75".
I hope that this information is helpful.
Cheers!
Who knows, maybe PSA could offer a perfectly engineered 7.5" flash hider/linear comp that is intended to be pinned & welded into their AK-V patterned firearms that will bring the barrel length to at least 16". It could even have a nifty notch in the base of the hider/comp just like the comp that ships w/an AK-V that is timed to lock into pin at the end of the sight post. That might be more economical for them as well as providing a trustworthy product for their customers!
In lieu of an actual 16" threaded barrel, at this point, I’ll buy one! Where would I throw the money?
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