Rare Pre Ban Cobray RPB Industries M10 SAP Open Bolt 45 ACP Pistol MAC10

SOLD FOR: $2,326

WOA#: WY240222AS007


Model: SAP M10

Serial Number: 82-0006501

Year of Manufacture:  1982

Caliber: 45 ACP

Action Type: Semi-Automatic, Blowback, Open Bolt (Bolt Closes on Trigger Pull)

Markings:  The right side is marked, “SAP M10. CAL 45 AUTO / RPB INDUSTRIES. INC. / ATLANTA, GA. U.S.A.”, “SAFE FIRE”,  “82-0006501”.

Barrel Length: 5.75” threaded blued barrel.

Sights / Optics: Iron sights. The front sight is a fixed post made of a bent metal wire. The rear sight is a fixed pinhole sight.

Stock Configuration & Condition: The receiver and frame are steel and has a polymer grip attached to the back of the magwell.  The polymer grip is pretty clean of any scratches or handling wear.

Magazine Quantity & Condition: One blued  30rd Grease Gun KL GL magazine in Very Good condition.

Type of Finish: Steel, Parkerized

Finish Originality: Original

Bore Condition: The bore is bright and the rifling is sharp. There is no erosion in the bore, just some minor fouling in the grooves. In this writer’s opinion the bore rates 9/10.

Overall Condition: This pistol retains about 93% of its metal finish. The markings are crisp. There are some scratches on the frame and receiver. There is light to mild operation wear on the action.  There is a nick on the left side of the receiver that has some rust. Please see photos for a better understanding of the condition.  Overall, this Pre Ban Open Bolt pistol rates in about Very Good condition.

Mechanics: The action functions correctly. We did not fire this handgun. As with all used firearms, a thorough cleaning may be necessary to meet your maintenance requirements. Open Bolt.  Charging handle twists for safe or fire.

Box, Paperwork & Accessories: This pistol comes with a foam lined hard case and a total of one magazine.

Our Assessment: The RPB SAP M10 Open Bolt Pistol was a semi-automatic version of the M10 submachine gun, which was designed by Gordon Ingram in 1964. The M10 was produced by Military Armaments Corporation and was available in 9mm and .45 ACP, and a smaller version called the M11 in .380 ACP.  The M10 was notable for its low cost of production, high rate of fire, and small size. RPB Industries later bought up the assets of Military Armament Corporation and resumed production under the RPB banner.

The RPB SAP M10 Open Bolt Pistol was submitted to the BATF for approval in 1978, and was approved as a semi-automatic handgun. Despite its low price and aggressive marketing, the gun did not gain wide acceptance among legitimate buyers.  However, it became a popular weapon among criminals, particularly in the drug wars of South Florida in the early 1980s.

During this period, criminals would buy the semi-automatic version of the M10 SAP and then modify it to fire in full-auto, making it a highly sought-after weapon for criminal gangs. Law enforcement officials seized around 200 M10 SAPs during criminal investigations, and the use of automatic weapons was relatively rare among American criminals. The M10 SAP was one of the most popular illegal machine guns of the era.

There were a few others, but this one made up the lion’s share of the open-bolt semi-auto pool. Despite a valiant struggle and a court case lost, the 1982 reclassification shut off much of RPB’s sales, and the company folded.  Claim this Rare Gem of firearms history today that has been grandfathered in.  Because it is a pre 1982 ban production it is fully legal to sell as Open Bolt.  Anything after 1982 is illegal so we are lucky here! Please see our photos and good luck on your bid! – L.S.

Rare Pre Ban Cobray RPB Industries M10 SAP Open Bolt 45 ACP Pistol MAC10
Rare Pre Ban Cobray RPB Industries M10 SAP Open Bolt 45 ACP Pistol MAC10