RPB Industries SM11-A1 .380 ACP Pre-Ban Open-Bolt Semi-Auto, 5 inch Threaded Barrel, Compact, 30+1, USA
This RPB Industries SM11-A1 is a pre-1982, open-bolt semi auto chambered in .380 ACP and built in Atlanta, Georgia. A compact member of the Ingram/MAC family, it features a 5 inch threaded steel barrel, top-mounted reciprocating charging knob, and a 30+1 capacity with double-column magazines. Fixed iron sights, a stamped-and-welded steel receiver, and a matte protective finish round out a collectible pre-ban configuration.
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 on the finish from prior handling and use.
What's Included
- RPB Industries SM11-A1 .380 ACP semi-automatic pistol
- 4x 30-round steel double-column magazines (RPB SM11-A1 .380 pattern)
- Ventilated tubular barrel shroud/handguard (separate)
- Nylon wrist/retention strap (installed)
Produced by RPB Industries in Atlanta, this SM11-A1 is a late-1970s to early-1980s example of the compact .380 ACP variant in the Ingram/MAC lineage. It carries the left-side roll mark "SM11-A1 CAL .380 RPB INDUSTRIES, INC. ATLANTA, GA U.S.A." and an SAP-prefix serial, reflecting its period RPB production.
The action is an open-bolt blowback semiautomatic, with the bolt visible through the ejection port and a top-mounted reciprocating charging knob. A two-position safety/selector provides SAFE/FIRE control. This configuration represents RPB’s pre-1982 open-bolt semiautomatic production prior to the ATF prohibition on new open-bolt semiautos.
The 5 inch steel barrel uses coarse external threads at the muzzle, and this example includes a ventilated tubular barrel shroud/handguard as a separate accessory. Fixed iron sights consist of a front post and a rear peep integrated into the back plate for a straightforward sight picture.
Construction is stamped-and-welded sheet steel with a matte protective finish and polymer grip panels, delivering the classic SM11-A1 profile in a compact .380 ACP format. It operates on simple blowback and feeds from detachable double-column magazines, with a 30+1 stated capacity. A nylon wrist/retention strap is installed.