I've been interested in ultralight firearms (knives too) lately. i think it started when a 6 and 1/4 lb 375 Ruger arrived.
I have remotely tested a 2lb (908gram) 12 ga with buckshot. Recoil appeared to be fierce as it disabled the remote firing cradle. An online recoil calculator estimates the recoil at 110 ftlb! Kind of extreme.
A 1 lb 22 rimfire would be neat, or perhaps a 2.5lb 5.56.
Talking long guns only here, non-restricted in Canada (standard firearms license)
Anyone else have something that's ultralight? Too light? I know mass in the gun helps with shooting and recoil management... but I like to push the envelope.