Ameli Chauchat machine rifle Cobray M11 Degtyaryov machine gun F1 submachine gun FBP submachine gun FN MAG and variants (including the M240) FN Minimi and variants (including the M249) Gevarm A6 Halcón M-1943 Intratec KG-9 Jatimatic Kk 62 Lahti-Saloranta M/26 Lanchester submachine gun Lewis gun M3 M56 M60 M231 FPW MAC-10 and variants (including the MAC-11) MAC-58 Madsen M-50 MAT 49 MG34 MG42 Mk-19 MP18 Minebea PM-9 MP40 Nikonov machine gun Owen Gun PK machine gun PM-63 RAK PPS submachine gun PPSh-41 PPS-43 Ranger-34a Rheinmetall MG3 RPD SG-43 SIG MG710 Star Model Z-45 Sten submachine gun Sterling submachine gun Steyr AUG (LMG configuration) Stoner 63 (LMG configuration) Thompson submachine gun Type 100 submachine gun UKM-2000 Ultimax 100 Uzi Vigneron submachine gun Voere 2005/1 MP3008 Mixed-mode Examples of mixed mode firearms (capable of operating from either an open bolt or closed bolt) include: CETME Model A FG 42 FN SCAR - Heat Adaptive Modular Rifle Johnson LMG LWRC IAR - M6A4 Legality Under United States federal law, fully automatic firearms are restricted under the National Firearms Act and other laws. In 1982, the Bureau of Alcohol, Tobacco, Firearms and Explosives ruled that certain semi-automatic open-bolt firearms manufactured after the date of the rulings are to be treated as fully automatic because they were "designed to shoot" automatically. Around the time of these rulings, the manufacture of new open-bolt semi-automatic firearms became uncommon in the United States. The open bolt semi-automatic versions of certain guns are often as costly as their fully automatic counterparts. This is because prior to the Hughes Amendment in 1986 most semi-automatic open bolt Mac-10s, Mac-11s and several other models were lawfully converted to full auto making these rare semi-automatic open bolts even more rare and desirable as collector items. However, there are many open-bolt firearms, that were designed from start to be a single-shot semiautomatic guns, that are not classified as machineguns. See also Closed bolt Action (firearms) References External links How Does it Work: Open Bolt vs Closed Bolt Firearms Firearm actions