M*CARBO Ruger LC Carbine / LC Charger Trigger Spring Kit

The M*CARBO Ruger LC Carbine / LC Charger Trigger Spring Kit is the cheapest meaningful upgrade for the LC fire-control, swapping four factory springs to cut pull weight without replacing the trigger group. M*CARBO rates the factory trigger near 5 pounds and claims this kit drops it under 3 pounds, roughly a 40 percent reduction, though results vary by about a pound depending on the individual gun. Because it tunes the shared fire-control rather than a caliber-specific part, the same kit fits every LC Carbine chambering, including 5.7x28, 10mm, and 45 ACP, plus the LC Charger pistol.

The kit ships with a lighter hammer spring, a lighter firing pin spring, a lighter trigger return spring, and a lighter sear spring, along with a firing pin spring installation fixture and a sear spring installation tool. Those two tools matter; the firing pin and sear springs are the fiddly part of the job, and the fixtures keep the captive springs under control during reassembly. M*CARBO frames the install as a firearm modification and recommends a qualified gunsmith, which is the right call given that a lighter hammer spring on a self-defense gun trades a crisper pull for thinner primer-strike margin.

Treat this as a range and competition feel upgrade for an LC Carbine that already runs. It will not turn the factory trigger into a match unit, and a spring kit cannot fix gritty engagement surfaces the way a stoning job or a complete trigger would. For owners who want a noticeably lighter LC trigger for under 30 dollars and are comfortable with the install, it is the highest-value path available on this platform.