Several things are wrong with this... Firstly, the Sig 556 is prohib, so the entire post is moot. Second, a Lower parts kit is around $500, so add the upper, stock and lower, you're well over $2000... and that's figuring with an $1100 U.S. made upper that might not even work properly on the lower, and won't ever be available up here anyway. At the end of the day, you'd have spent over $2000 for something that is inferior to what you can get here.
But again, the Sig 556 is prohibited, so there is no way your idea would ever be viable.
By your logic, the Classic Greens would never have made it in the country because they're based on the semi sig 550 (a prohib rifle in Canada). As you should know, the Classic green lowers were different enough NOT to be classed as the semi sig 550 variant, hence we have them available here.
If someone wants to look into building or bringing in a sig 556 type rifle the same way (by using a non-prohib lower like NEA one, let them! It wasn't long ago when people said we'd never have a canadian AR.
As far as this rifle quality goes, maybe some people just want to be able to get one for the sake of having one as part of a collection or gentle range use. Its not our business to judge them. Besides, I don't think anyone would buy anyway unless the rifles are warrenty supported anyways.




























....I had forgotten all about that, as generally the lowers are considered the firearm.






















