OA-15 SSP

The Bavarian arms manufacturer Oberland Arms presented its new Short Stroke Piston (SSP) system for the OA-15 at the IWA. Like most such systems, the gas intake is adjustable. The principle is simple: instead of redirecting the propellant gases back into the receiver to move the bolt carrier rearward, a linkage is interposed. This means that the hot gases no longer enter the receiver, but on the other hand, the firearm becomes heavier and front-heavy, and there are more moving parts. More information can be found in the Oberland Arms IWA 2014 brochure!