The Smith Defense AR-15 Mil-Spec Lower Parts Kit is a complete solution for finishing your lower receiver. Built to strict standards, the kit ships with an A2-style pistol grip and a Mil-Spec trigger-guard assembly, and every metal surface is ground and polished for a smooth, reliable fit.
Designed for builders who want quality without hunting for individual components, this lower parts kit contains Mil-Spec-grade parts chosen for durability and consistent performance. Whether you’re upgrading an existing rifle or finishing a new build, Smith Defense delivers the components you need for dependable operation and long service life.
What’s included:
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Mil-Spec fire control group with polished, ground sear surfaces
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Mil-Spec pin kit
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A2-style pistol grip (Mil-Spec lower build kit style)
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Mil-Spec bolt catch
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Mil-Spec trigger guard
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Mil-Spec magazine catch
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Mil-Spec buffer retainer kit
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Mil-Spec selector kit
If you want a solid foundation for a hunting, target, or defensive AR-15, this Smith Defense lower parts kit gives you the parts and finish quality to achieve excellent results.
