Its a shame that there has not been a larger aftermarket for the Kel-Tec Sub 2000. Despite the near universal praise of the 1st generation platform, Kel-Tec only produced a fraction of what the market demanded. Now on the equally praised 2nd generation, Kel-Tec has kicked up production (so much so that I actually saw one in a store and not just over-priced on GunBroker).
Recognizing the customer base has grown and will continue to grow, M-Carbo springs has released a spring kit for the 2nd Generation Sub 2000. The kit includes three springs: a hammer spring, sear spring, and trigger return spring. When installed, they will reduce the pull from about 7.5 lbs to a respectable 5.5 lbs.
While designed for the 2nd generation, the spring kit will function in the 1st as well. Springs are manufactured from ASTM A228 Music Wire and 302 Stainless Steel Spring Wire. All springs are backed by a M-Carbo Lifetime Warranty and are made in the USA.
For those not wanting to be the home gunsmith, M-Carbo offers Professional Installation services. With a surprisingly short 5-7 day turn-around time the M-Carbo smiths will install any of their spring kits for $35.00.
Retail for the spring kit is pegged at $34.99. At the time of this writing, M-Carbo is offering the spring set on special for $29.95. A portion of every sale is donated to military-oriented foundations.