I Have This Old Gun: Detonics Combat Master Mark VII Pistol

** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
detonics.jpg

As a compact semi-automatic chambered in .45 ACP, named after an explosives company and conceived before “concealed carry” became a buzzword, the Detonics Combat Master is understandably obscure—except to a small group of dedicated fans.

The concept of a hard-hitting pistol that could be carried in one’s coat pocket, but was more than just a chopped-and-channeled M1911, was conceived in the 1960s by Pat Yates, an Explosives Corp. of America (EXCOA) engineer. A fellow worker, Sid Woodcock, offered to help. They were soon joined by Mike Maes and Chuck Lyford, who owned a Seattle, Wash., explosives company called Detonics. Having no firearms experience, they nonetheless decided to mass-produce the pistol. Thus, naming the gun after their company, the Detonics Combat Master was born.

Measuring 6¾" long by 4 58" tall, with a 3 1/2" barrel, the Combat Master was not much bigger than a Walther PP, but was chambered for the man-stopping .45 ACP. The magazine held six rounds; a seven-round M1911 magazine would function, but it projected from the frame. Even the six-round magazine protruded slightly, but with only five rounds, it fit flush against the beveled magazine well. There was no grip safety, and a flared muzzle meant no barrel bushing was needed. But perhaps the most visually arresting feature of the Combat Master was its fixed rear sight, which was positioned far forward, close to the ejection port.


The first guns were matte blue; brushed nickel, chrome, polished blue and two-tone finishes came later. Stocks were wood or Pachmayr rubber. Approximately 17,000 guns were made between 1976 and 1987, but 10 percent were returned because of malfunctioning. Another problem was the Combat Master’s $389 price tag. In comparison, a new Colt Combat Commander cost $250 at the time. By 1984, the Combat Master’s price had risen to $754.

The company went through numerous owners and name alterations, and at one time was owned by the late novelist and gun writer Jerry Ahern—who featured the Combat Master in many of his apocalyptic novels. Although other models were produced, the Combat Master remained Detonics’ flagship. The matte-finished stainless steel Combat Master Mark VII shown here has no sights (allegedly a special CIA version), which adds to its mystique. In its 99 percent condition, with accessories—original box, fleece-lined case and original accessories brochure—it sold for $1,769 in July 2018 at Lock, Stock, and Barrel Auctions (lsbauctions.com).

Gun: Detonics Combat Master Mark VII
Chambering: .45 ACP
Serial No: CR14XXX
Manufactured: c. 1980s
Condition: 99 percent—NRA Excellent (Modern Gun Standards)
Value: $1,769

Latest

Stoeger STR-9 Thinline+ pistol
Stoeger STR-9 Thinline+ pistol

New for 2026: Stoeger STR-9 Thinline+ Pistol

Stoeger refines its STR-9 Thinline pistol to be even easier to carry.

Finding The Natural Point Of Aim

Nearly every shooter understands the basic principles of marksmanship: position, grip, sight alignment, breathing, trigger control and follow-through.

Firearm Ownership Reaches New Record

The NSSF estimates there are more than 32 million modern sporting rifles in circulation.

Preview: Hornady 12th Edition Reloading Manual

While the internet offers quick access to information, trusting unvetted recipes for cooking up ammunition is less than ideal, which is why makers of reloading products like Hornady publish thorough books for such tasks.

Review: Bushmaster V-Radicator

The business of dispatching unwanted critters requires a platform capable of a high degree of accuracy. Nuisance animals such as prairie dogs are both small and skittish in nature, meaning that they tend to keep their distance and scurry away upon the arrival of incoming fire.

New for 2026: Smith & Wesson FPC in 5.7x28 mm

The folding carbine line expands to include the 5.7 mm chambering.

Interests



Get the best of American Rifleman delivered to your inbox.