JP MK IV Trigger Package
Swappable Roller Billet Trigger
Our MK IV Trigger combines the latest generation of our trigger components developed and perfected over the last thirty years. The result is a refined, fully customizable trigger setup with mission-specific versatility With a quick and easy installation, you'll achieve all the benefits of a trigger module with none of the drawbacks.
Package includes MK IV Trigger with adjustment screws, adjustable EZ Disconnector, JP Speed Hammer, JP Anti-Walk Pins, trigger spring, two hammer springs, wrenches and thread locker.
This trigger kit is usable with small-frame (AR-15), large-frame (AR-10) and PCC applications.
Features:
- Fully customizable trigger system for any application
- Compatible with and Mil-spec-pattern platform
- Multiple adjustments ensure a perfect fit in even out-of-spec receivers
- Quick and easy installation with no gunsmithing required
- Reduced lock time
- Precise component relationship with no slop
- Updated trigger design that virtually eliminates dirt-related stoppages along with easier install/removal
- Upgraded component materials to reduce wear and breakage
Safety Selector Compatibility:
For the best, quickest and easiest install, add on our adjustable JP Dual-Throw/Sure-Set Safety Selector with you choice of levers at a discount. Not only does it ensure perfect safety function regardless of receiver hole placement, it offers your choice of lever profiles and colors and reversibility for either a standard 90° or short-throw setup. This safety includes your choice of two levers.
You can also pair the MK IV Trigger with the third-party safety of your choice. While we can't guarantee compatibility with every possible selector on the market, all those we tested functioned without issue.
Spring Selection Guide:
- Competition/Recreation
The yellow/yellow combination may be used for competition and various recreational applications with hand loads or domestic-manufactured, non-military ammunition. It will result in a release weight in the 3.0-3.5 lb. range on most receivers.
- Enhanced Ignition Reliability
The yellow trigger spring combined with the red hammer spring will yield a release weight of 3.5-4.0 lbs. on most receivers and offers increased reliability for (5.56 NATO) or foreign-manufactured ammo with low sensitivity primers. The yellow-red springs must be used for any large-frame AR installation to ensure 100% ignition reliability. This is also the minimum acceptable combination for tactical duty (LE) installations and should be used only with domestic-manufactured ammo in this application.
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Duty/Defense
The tactical spring set includes a full powers (grey) hammer spring (purchased separately) and yellow trigger spring. It may be required for agencies that mandate a trigger release weight of over 4 lbs. This set up also insures 100% ignition reliability on both AR-15 and AR-10 type rifles.
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CMP
To meet NRA Service Rifle Competition rules of a 4.5 lb. release weight, the CMP spring set (purchased separately) includes the full-power hammer spring and a custom trigger return spring, which will allow you to tune to a release weight just over 4.5 pounds to lift the NRA weights.
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