Those are a double trigger model, unless it's a BL-2S which means they hae a "speed trigger". That was a funny looking rocker type device whih when you used the top half it fired one barrel and the bottom, the other.
The book says more than GN, 375 or so. Speed trigger model is more.
HM
The book says more than GN, 375 or so. Speed trigger model is more.
HM
