#Short-stroke
A Short (Stroke) History of Tappet Operation, Part IV: Post-War Tappets
It has been a little while since our last installment of A Short (Stroke) History, but in this article I intend to wrap up my coverage of tappet-operated rifles by cataloging most of the post-war developments of this mechanism.
Newtown Firearms' Infinitely Adjustable Gas Piston System
Tagged with a name that reminds me of continuously variable automobile transmissions, Newtown Firearms of Siler City, North Carolina have announced an “infinitely adjustable” gas piston operating system: