Legality of blast chambers?

[u/RowingCricket]

Weird title sorry. Spoke with the guy at WW and he said this and his Giga Chad end cap will be legal in Canada since there is no noise attenuation.

What do you guys think? I have a Botnia brake right now and the blast is significant. I wouldn't mind trying this but don't want to purchase anything that would be considered a suppressor.

https://www.withoutwarningcorp.com/product/coupler/

[u/uber_poutine]

It's similar to the ones that b&t make, which are legal. 

See: https://rdsc.ca/b-t-blast-deflector-rotex-11a-glass-breaker.html