You are wrong.
The 30 day window only applies to changes to firearms that already have registration certificates.
Once you put the restricted length upper on the lower, you are now in possession of a restricted firearm. Under our laws, you can only possess a restricted firearm at your place of residence or a place authorized by the CFO (specific to that firearm- your ATT only applies to firearms registered in your name).
So once you attach the upper, you better be in your home or hope you aren’t investigated by police possessing it outside your home.
I am in fact correct, The BC CFO will tell you the exact same thing that I mentioned, Michael Loberg has also confirmed this in multiple comments in CCFRs Facebook page about a fx9 post and how the shorter uppers are sold for NR rifles, Wolverine and Dlask have both mentioned this on various posts on the forums. No where did I suggest you to go shoot an unregistered restricted on crown property, that would be illegal to do.
Do your research, make some calls, your assumption and interpretation of the laws don't mean they are correct. These short uppers are popular for the exact same reason, people wanting to shoot a SBR version of their previously NR rifle without the hassle of owning a completely restricted rifle.
Nobody in their right mind spends 700$ to buy a upper to convert their NR to R when the complete rifle in Restricted format is 1099 New, and 800 used.
1. You have 30 days to report permanent changes to a firearms state to the CFO,
2. Restricted rifles can only be fired at an approved range, which you are at.
3. You are transporting a NR rifle to and from the range.
4. Upon removal of the shorter upper, your rifle is NR. you can transport it back home. Assuming your serial is not already registered to a R rifle. In the event that you wish to leave your shorter upper on the rifle permanently, you need registration certs for transport, you need to call in the CFO and report the changes, then apply for a ST ATT to bring it home.
5. If the change was done at home, you need to report it within 30 days, and cannot transport it out of your residence without your certificates, installing the NR upper will now require a second call to de register it, for which you need to wait for your revocation letter after a certified shop, manufacturer checks it and confirms NR status with the CFO. (assuming you plan to leave it on permanently)
No laws are broken, even when shooting it at the range, assuming you have a non restricted license. Your NR license allows you top own possession of it with the shorter upper installed given that you still have 30 days to report the changes if permanent. During the shorter upper being installed, it is treated as restricted, transport is not a concern since it was never transported as a restricted, but a NR.
I understand that your personal opinions and desires may not agree with it, or you may not be able to comprehend what I'm saying, which I sincerely feel sorry for, but one is respecting and satisfying every law applicable during the process, and every requirement for transport in the rifles respective state at the time is met. This also applies to any other similar firearm, such as a WK/Raven/ATRS/Bren/etc that may have a NR Rifle in complete state and a shorter barreled upper to go with it. It is completely legal, and unaware to you, people have been doing this for years. But I should mention, I'm done debating this topic to you, as your clearly are not open to any other perspective but yours, and if you still feel otherwise, pick up the phone and call you local CFO, gun stores, firearms manufacturers, or even Solely, they will all repeat the exact same thing I'm trying to explain you
