This M4 Replacement Kit includes the Revolution trigger along with a selection of optional springs to achieve a variety of release weights depending on your application. The combination of our unique trigger with its improved sear geometry and the roller trigger, this kit is an ideal drop-in trigger for any M4 or AR-type rifle. At a price much lower than any other trigger solution, this kit alone has been shown to yield a smooth roll-off feel that allows for consistent shot placement when accuracy is required._x000D_ The springs included with this kit include the yellow hammer and trigger springs, which may be used for competition and recreational applications with hand loads or domestic made non-military ammunition. The yellow/yellow combination results in a release weight in the 3.0-3.5 lb range on most receivers. Also included is the red hammer spring for use with military (5.56 NATO) or foreign-manufactured ammo with low-sensitivity primers. The red hammer spring MUST be used on any tactical duty (LE) installations and any AR-10 type installation for 100% ignition reliability. The yellow/red combination results in a release weight of 3.5-4.0 lbs on most receivers.
3 in stock