BT9 is basically a 9mm pistol with a shoulder stock to aid in accurate shooting. In semi-auto form, it works well to 200m, especially with an optic like the Trijicon Reflex 2 shown. Nearly no felt recoil. A great defensive tool for people who lack the strength to operate a full-size carbine and who cannot control a hard-recoiling pistol. Naturally, it’s heavily regulated in the US as a “short-barreled rifle”.
Swiss shooters are trained to use the same stance with all shoulder-fired weapons, hence the “elbow up” position. As with the other Swiss-made guns I tried, this one was 100% reliable and very accurate.