Ubusambanyi hejuru yumurongo (nanone bwitwa cross camber na cross bow) bugaragazwa nkijanisha ryubugari bwumugozi. Kudahuza kumurongo, rimwe na rimwe bita coil-set, nabyo bigaragazwa nkijanisha. Keretse niba byumvikanyweho ukundi kuburebure bwo gupima = ubugari bwumurongo wo gupima uburinganire hamwe no kuruhande. Ingaruka ziterwa nimpagarara zisigaye ziva kumurongo zirahari.