The MK109 PRO’s long-stroke piston operating system helps to smooth out recoil impulse compared to other platforms which use a short-stroke piston. PWS designed a forward-canted “dwell ...

On the M1 Carbine, the piston is separate, bridging the gap between gas and the operating slide, cycling it with a short, fast movement. This was the first major use of a short-stroke gas piston ...

In 6.8 SPC those numbers change to 2650 fps and 1793 foot pounds. As I said, I fell in love with these rifles. The piston-operated system seems like common sense to me.

Action: Short Stroke Gas Piston Operated Semi-automatic Caliber: 5.56 NATO/.223 Rem Chamber: .223 Wylde Upper Receiver: Machined Billet 7075-T6 Aluminum, Hard-Coat Anodized Ejection Port Cover: Yes ...

Tough matte black or FDE Cerakote finish MSRP: $589.99 - Black / $679.99 - FDE Recoil control is distributed between a soft rubber buttpad and a long recoil spring located behind the gas piston.

The rifle shares many features with the AK-47—of which Israeli had captured many—including the gas piston operating system and even the manner of inserting ammunition magazine.