The BSS guns have mechanical triggers. However, as most "mechanical" triggered guns, there is still an inertia mechanism in there, to keep the gun from doubling. It doesn't require the recoil of a shell firing to set but it briefly disables the firing of the second hammer during the recoil of the first shot. The parts still need to be clean and lightly lubed. The trigger and link also need to allow the mechanism to move properly, so the second barrel will set for firing.

> Jim Legg <