GBM waa nooc ka mid ah mashiinka birta ee birta ah oo loo adeegsado garka goynta oo si weyn loogu isticmaalo warshadaha qaabdhismeedka birta.
Waa nooca lugaynta oo ay weheliso geeska saxan oo leh xawaare sare qiyaastii 1.5-2.8 mitir halkii daqiiqo. Moodeels GBM-6D, GBM-6D-T, GBM-12D, GBM-12d-r, GBM-16d-r, GBM-16d-r, GBM-16d-r, GBM-16d-r oo loogu talagalay ikhtiyaarka kala duwan ee kaladuwan ee xaashida birta badan.
