JP Original Fire Control Kit for .154 small pin receivers consisting of a JP trigger with engagement and overtravel screws and disconnector spring installed as an assembly, disconnector, Instructional video, and Spring selection:
Standard The standard spring sets included in all JP Fire Control kits 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.
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.
red hammer spring MUST be used on any tactical duty (LE) installations and any AR-10 type installation for 100% ignition reliability.
yellow/red combination results in a release weight of 3.5-4.0 lbs on most receivers
HAMMER IS NOT INCLUDED IN THIS KIT