Anderson AR-15 Complete Lower Parts KIT 5.56 - W / Hammer and Trigger Mil-Spec # G2-K421-D000-0P
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Anderson Manufacturing
Overview
The Anderson AR-15 Complete Lower Parts Kit is designed for builders looking to assemble a reliable lower receiver for their 5.56 NATO platform. This complete kit includes all the necessary components, such as a MIL-SPEC hammer and trigger, ensuring compatibility and performance with standard AR-15 specifications. Commonly found in carbine gas system builds, this kit provides a solid foundation for your next firearm project.
Specifications
Anderson AR-15 Complete Lower Parts KIT 5.56 - W / Hammer and Trigger Mil-Spec # G2-K421-D000-0P
September 2026 on GunPartPicker
Anderson AR-15 Complete Lower Parts KIT 5.56 - W / Hammer and Trigger Mil-Spec # G2-K421-D000-0P ranked #248 of the 477 lower receivers builders added on GunPartPicker in September 2026. Builders have been adding it to their builds on GunPartPicker since January 2026. All time, it ranks #269 of the 1,034 lower receivers builders have added.
It was out of stock everywhere we track for all of September 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $47.99 at KY Gun Company for when it comes back.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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Frequently Built With
The part most often added in each category by the builds that include this one
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Build Configuration Breakdown
Aggregated and anonymized data showing how builders use this product
CaliberBased on real build data showing which calibers builders choose alongside this product.
Gas SystemBased on real build data showing which gas system lengths builders use with this product.
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