Hi jhnvan,
Thanks for taking the time to answer. I warn you, you're dealing with a newbie here.
My perception was that the buffer tube is counted in the overall length of an AR-15 because it will not function properly with the buffer tube removed. I am specifically referring to US rules here as I understand that in Canada that the AR-15 was restricted status in Canada, regardless of the length.
In the case of the Spectre LPC, it will function properly with the buffer tube, and it can be 'easily' removed. Would that not exclude the buffer tube as being counted as part of the Spectre LPC's 26" overall length as it pertains to maintaining its NR status in Canada?
A lot of firearms can be fired with parts removed. Think of rifles with full wooden stocks, nothing that stops them being shot with the stock removed (well maybe besides common sense and looking stupid).