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The JP Enterprises JPS4.0 Tactical Trigger Spring Kit is one of those small upgrades that punches way above its size. Instead of dropping in a whole new trigger, you swap the trigger, hammer, and disconnector springs and immediately feel a smoother, lighter break. Paired with JP Fire Control parts, this kit is designed to bring your trigger pull into the 4.0 to 4.5 pound range, which is a sweet spot for a lot of folks who want crisp control without going super light.
This is a set of custom-wound springs built to replace the factory springs in your fire control group. It comes with the trigger spring, hammer spring, and disconnector spring, along with instructions on prepping your parts to get the best results. The kit shines with JP trigger components, and while it will physically drop into a standard mil-spec setup, you won't see the same dramatic improvement you would with polished or JP parts. If you're running JP fire control, this is basically the finishing touch.
Not everybody wants to spend a couple hundred bucks per rifle on a match trigger, especially if you've got a safe full of AR builds. This spring kit is a smart middle ground. It gives you a noticeable bump in feel and pull weight for a fraction of the cost, and plenty of builders keep a stash of these to run across all their rifles.
A lighter hammer spring can be picky about hard, low-sensitivity primers, so this kit pairs best with domestic ammo and works most reliably alongside a properly prepped or bobbed hammer. Install is quick with basic AR tools, and the payoff is a trigger that feels dialed in and consistent shot after shot. It's a favorite among competition and recreational builders who care about how their rifle feels the moment they press the trigger.
Paired with JP Fire Control parts, the JPS4.0 is designed to yield a 4.0 to 4.5 pound trigger pull. This puts it in a comfortable range for both range and competition use. Keep in mind those numbers assume you're running JP or properly prepped fire control components.
It will physically fit a standard AR-15 fire control group, but the kit is intended for JP trigger parts and won't necessarily produce a big change with unpolished mil-spec components. For the best results, run it with JP or polished fire control parts. Many builders also pair it with a bobbed hammer for reliable function.
The kit includes replacement springs for the trigger, hammer, and disconnector. JP also includes instructions covering how to prep your parts to get the smoothest feel. Everything you need to swap out your factory springs is in the package.
A reduced-power hammer spring can be sensitive to hard, low-sensitivity primers found in some foreign or steel-case ammo. Sticking with domestic ammunition and using a properly prepped or bobbed hammer keeps ignition reliable. For recreational and competition shooting with quality ammo, it performs consistently.
| UPC | 812872022161 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | JPS4.0 |
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