Izikrufu ze-Custom M3 M4 M5 Thumb Knurled, ezifumaneka ngentsimbi engagqwaliyo, ibronze, kunye ne-aluminiyam eyosiweyo, zidibanisa ukuguquguquka kunye nokulula. Uyilo lwazo lwentloko ezijikelezileyo luhambelana neendawo eziyosiweyo ukuze kube lula ukuziqinisa ngesandla—akukho zixhobo zifunekayo—zilungele ukulungiswa ngokukhawuleza. Intsimbi engagqwaliyo inika ukumelana nokugqwala, ibronze igqwesile ekuqhubeni, kwaye i-aluminiyam eyosiweyo yongeza ukuqina okukhaphukhaphu kunye nokugqitywa okucekeceke. Ezi zikrufu zinobukhulu be-M3 ukuya kwi-M5, zilungele iiprojekthi ze-elektroniki, oomatshini, kunye ne-DIY, zilungelelanisa uyilo olusebenzayo kunye nokusebenza okukhethekileyo kwezinto zokubopha okuthembekileyo nokulula ukuyisebenzisa.
