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Suppressors Baffles & Threaded Barrels

By Frank Iannamico

In recent years the suppressor business has (silently) boomed. The reason for the sudden demand for suppressors (also known as silencers) is unclear; they have been available for many years from a number of manufacturers. Many of the older companies that manufactured suppressors “back in the day” are gone, however an ever growing number of new firms have sprung up to meet the current demand. Many large retailers, wholesalers and local dealers have now added suppressors to their product line. Suppressors have become such a mainstream item, many firearm manufacturers now offer models with factory threaded barrels to mount them.

The initial credit for producing suppressors for the civilian market can be traced back to the same company that made submachine guns available for the commercial market, the Military Armament Corporation. The suppressors sold by MAC were originally a product of Mitch WerBell III’s SIONICS Company, which eventually became the Military Armament Corporation. Although MAC originally focused their attention on government and military customers, a large number of their suppressors and submachine guns were made available to the public after being sold at their bankruptcy auction in 1976. Companies that followed MAC, like RPB and SWD, sold basically the same products as the Military Armament Corporation, except they concentrated on civilian sales, a market that was beginning to grow rapidly.

The original sound suppressors designed and sold by the Military Armament Corporation were quite large, when compared to most of the suppressors available today. However, in their day the SIONICS suppressors were considered state of the art. There were several different suppressor designs manufactured. The first type was a two-stage unit for the 9mm and .45 caliber Model 10 submachine gun, that consisted of a rear tube that served as the gas expansion chamber, and was filled with aluminum eyelets or wire mesh to provide maximum heat absorption. The front tube had a conical baffle to trap gases and absorb heat and direct the gases rearward, delaying movement into the next component. After the gases passed through the baffle, they encountered a spiral diffuser that absorbed...


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