Alamo 15 Trigger: High-Performance AR-15 Trigger Upgrade Overview The Alamo 15 Trigger is a precision-engineered, high-performance trigger designed specifically for AR platforms chambered in .223/5.56. Developed by Thomas Allen Graves, the original inventor and patent holder of the positive displacement reset trigger, this trigger embodies over 40 years of research https://remingtonrfflf.bloggosite.com/42721764/alamo-15-trigger-high-performance-ar-15-trigger-upgrade