The Schmid Inside SI-LPK-FRK1 SI LPK Field Repair Kit is a compact AR-15 lower parts repair kit with the small pins, detents, and springs commonly needed during lower receiver assembly, repair, or field maintenance. It is a smart spare-parts kit for the bench, range bag, armorer kit, or rifle case.

Small AR-15 lower receiver parts are easy to lose during assembly and can stop a build or repair if one spring, detent, roll pin, or retaining part goes missing. This Schmid Inside field repair kit gives builders and armorers a practical selection of lower parts kit spares without buying a complete lower parts kit.

Common AR-15 Lower Repair Parts: Schmid lists this kit with a hammer pin, trigger pin, safety detent, safety detent spring, bolt catch roll pin, bolt catch plunger, bolt catch spring, buffer retainer pin, buffer retainer spring, takedown spring, takedown detent, pivot spring, and pivot detent.

Useful for Builds and Repairs: This kit is useful when assembling AR-15 lowers, replacing worn or damaged lower receiver parts, recovering from a lost detent or spring, or keeping critical small parts on hand for range and field support.

Pairs Well With Custom Trigger Builds: Builders installing a separate fire control group, ambidextrous safety selector, or lower parts kit may want spare pins, springs, and detents available during assembly. This kit helps avoid stopping a build over a small missing part.

Important Fitment Note: This kit is intended for compatible AR-15 lower receivers. Confirm lower receiver compatibility, pin fit, bolt catch fit, buffer retainer fit, safety selector compatibility, takedown/pivot pin fit, and all applicable laws before purchase or installation.

Related Gear: Browse more Schmid Inside products, shop the AR-15 Store, or pair this repair kit with a compatible Schmid Inside AMBI Lower Parts Kit Less Fire Control Group.