The STEYR GL 40 can be used as standalone grenade launcher or as under barrel launcher.
270 mm, 10.6“
180 mm, 7.1“
6 grooves, rh, 1 turn in 1,2m
DAO – double action only
100% ambidextrous Blocking the Hammer, Transfer bar between the Hammer and the firing pin (actuated via trigger)
Breech loading, break-action barrel