Modern Sporter dedicated rimfire upper UPDATE NOV 7

[alberta tactical rifle]

All I can say to that is

I don't disagree but he is the man who makes the rules.
Never fear, when I run the world you will like it better!

[happyzappy]

I appreciate the good work you guys have done and are doing, so I wont let my frustration with their response stop me from supporting you guys.

Keep up the good work.

[Shorerider]

Well crap. That changes my plans. Better to find out now and not have the legal problems later.

[alberta tactical rifle]

Well crap. That changes my plans. Better to find out now and not have the legal problems later.

Hence my taking the time to request clarification from the power that is.
120ish makes some strong and reasonable points in his interpretation, but I do not want to put anyone in a poor legal situation.
Believe me we don't like the decison 1 bit either but now knowing is still better than having to purchase a lawyer cuz they ain't cheap when things went poorly.

[Hondatech]

Well that just pee'd in my cornflakes. Oh well, build up the 5.56!

[jiffx2781]

...

[alberta tactical rifle]

So according to "the man" this 22lr upper would be perfectly legal to strip and install on the MS?

https://www.cmmginc.com/product/uppe...p-mk4-a4-22lr/

I would think so given the 20" barrel.
My take away from Murray's correspondence is that the MS was submitted as a centerfire rifle. The modularity has in this case worked against us.
We are free to swap uppers to any caliber the platform will support and to keep NR status the barrel regardless of length has to be 18.5" or longer.
He replied in further emails that IF we were to design and make a lower that was dedicated to 22LR the rules would be different and the shorter barrel situation "could" apply.
BUT this means another fairly significant investment in time and money to design and then submit a production rifle for inspection.

Frankly I believe the CMMG kit you suggest is one of the better options for having a 22LR upper for the least cost and shortest time to get shooting.

[Mark-II]

Those are some real strange logical hoops for them to jump through.

The CFC should have some proper lawyers on staff instead of interpreting law by the seat of their pants, because this is patent BS - the "underlying" firearm is NOT capable is discharging centrefire ammunition. I'd love to see the lab try it with a rimfire barrel and bolt...

[rprince89]

I agree, I'm out, at least on a .22 not restricted build. The whole purpose for my wanting to do an AR22 build was a shorter non restricted. If I wanted a short barreled restricted I'd already own one in .223 and if I wanted a full length non restricted I'll go with a more diverse caliber. This sucks, ruined my day

[robab]

So for now keep my 20” barrel and cmmg conversion kit.