RPB Industries SM11-A1 .380 ACP Open-Bolt Semiautomatic Pistol, 11.5 in Barrel with Ventilated Shroud, Pre-1982 Production
This RPB Industries SM11-A1 stands out as a pre-1982, open-bolt semiautomatic .380 ACP pistol with an 11.5-inch extended barrel and a ventilated tubular shroud. Built with a stamped and welded steel receiver in a matte dark gray/black finish, it features a top-mounted knurled charging knob and fixed sights integral to the backplate. Produced within the 1981–1982 window preceding the ATF reclassification of open-bolt MAC-type semiautomatics, it is a notable example for collectors and enthusiasts.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: This firearm is in solid shape. There are scratches and blemishes present. The bore is clean and shiny.
What’s Included
- RPB Industries SM11-A1 .380 ACP pistol
- One 32-round steel magazine
- One 16-round steel magazine
The SM11-A1 uses an open-bolt blowback, semiautomatic action in .380 ACP and a magazine-in-grip layout. Its pistol configuration is correct with no stock fitted, and capacity is rated at 32+1.
The extended 11.5-inch barrel is enclosed by a ventilated tubular shroud, giving added forward length while maintaining the compact MAC-family profile. A top-mounted, knurled, reciprocating charging knob provides straightforward manipulation.
Sights are fixed, with a front blade and a rear notch integral to the backplate. The receiver is stamped and welded steel with a matte dark gray/black finish that matches the overall steel construction.
Manufactured in the USA during 1981–1982, this example is part of the preban period prior to the ATF’s 1982 reclassification of open-bolt semiautomatic MAC-type firearms. Receiver markings present as “SMII-AI,” reflecting the I-shaped numerals used for the model designation.