Joalo ka feme ea li-screw e nang le boiphihlelo ba lilemo tse fetang 30, re ipapisitse le tlhahiso, lipatlisiso le nts'etsopele, le thekiso ea M3 Thumb Screw. Boitseanape ba rona le boinehelo ba rona ho boleng bo re etsa molekane ea tšepahalang bakeng sa litlhoko tsohle tsa hau tse potlakileng. Ka boitlamo ba rona ba ho iketsetsa, re ka fana ka litharollo tseo e seng tsa maemo tse tsamaellanang le litlhoko tsa hau tse ikhethileng.