Strike Industries SI-AR-LRSK-PRO | AR-15 Lower Spring Kit

This Strike Industries AR-15 lower receiver spring gunsmith kit provides essential replacement springs used during assembly, maintenance, and repair of stripped AR-15 lower receivers. The kit contains the specific springs commonly lost or replaced when installing lower receiver components. It is offered in a Mil‑Spec sizing and finished in black metal suitable for standard AR-15 builds. Typical applications include gunsmithing a newly built lower and routine maintenance or part replacement during repairs.

Product Specifications

• The kit contains 9 springs commonly replaced or easily lost when building AR-15 lower receivers.
• The set includes springs for the bolt catch, disconnector, buffer retainer, trigger, hammer, magazine catch, selector, and two detents.
• The product type is listed as a Spring Kit.
• The kit is supplied in a Mil-Spec size.
• The kit is designed for the AR-15 platform.
• The components are made from metal.
• The finish on the parts is black.
• The manufacturer is Strike Industries.
• The manufacturer part number is SI-AR-LRSK-PRO.
• The kit ships in a gunsmith bag (X20) per vendor description.
• The listed item weight is 10 oz.
• The UPC for this item is 700371179922.
• The kit is intended for lower receiver assembly and maintenance in AR-15 builds.

This compact, specific-purpose kit supplies the springs most frequently required when assembling or servicing an AR-15 lower receiver. Its Mil‑Spec sizing and straightforward contents make it a practical choice for gunsmiths and builders who prefer to replace small parts during a build or to replenish a toolbox for regular maintenance tasks.