This is from the facebook JB fanpage and shows the results of a test carried out by Sussex Armoury. Febuary 1980 simple lever single stroke pneumatic. JB patent valving.
https://scontent.fbhx1-1.fna.fbcdn.n...a9&oe=5CA4818C
This is from the facebook JB fanpage and shows the results of a test carried out by Sussex Armoury. Febuary 1980 simple lever single stroke pneumatic. JB patent valving.
https://scontent.fbhx1-1.fna.fbcdn.n...a9&oe=5CA4818C