On the real MAC-10 the ability to lock the bolt forward is an important safety feature: The weapon fires from an open bolt, so if it was carried decocked with a magazine attached, a knock from dropping the weapon could retract the bolt far enough to strip a round from the magazine, but not quite far enough to get caught by the sear.
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"WTS: M11A1.380 POLISHED & BLUED $4500.00" Shooting .380 through 9mm barrel? Help! RPB OBS problem; Metal mags for M11/9 SMG; Sturdy MAC-10? Mac smith? Anyone get good at shooting the MAC pistol style on FA? Has anyone heard of Glock Mags In a MAC-11; Using MAC-10; Cobray trigger slap; Question on Zytel mags; Biggest Magazine; Drum for M-11/9
Its core design was based on the open bolt MAC-10 which was larger in size and capable of firing a .45 ACP cartridge. The M11A1 by KWA is a gas powered submachine gun based on the smaller compact M-11 design set by Gordon Ingram. Similar to its real counterpart, the M11A1 fires from a true open bolt system.