Primary Weapons Systems (PWS) conducted rigorous testing of its compensators across a diverse range of rifle platforms, including M4s and AK-47s. Through extensive testing involving high round counts, PWS observed a significant disparity in maintenance requirements between these rifle types. From this foundational insight, PWS developed the innovative long-stroke piston system. This system preserves the fundamental principles of the AR-15 design while effectively reducing maintenance needs in challenging conditions and during high-volume firing. Furthermore, the PWS 1/2-28 thread mount facilitates seamless attachment of Primary Weapons Systems suppressors, enhancing versatility and compatibility across firearms equipped with 1/2-28 threads.

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