Upgrade your AR-15 build with the Presma 28 Piece Lower Parts Kit, a high-performance component set designed for reliability, customization, and precision. This kit excludes the fire control group (trigger, hammer, disconnector) and pistol grip—perfect for builders who want to hand-select premium components to complete their custom lower receiver.
Each part in this kit is precision-machined and manufactured from durable, high-quality materials to ensure long-lasting performance in any shooting scenario—from the range to the field. Whether you're finishing a new build or replacing worn components, Presma offers the reliability and craftsmanship you demand.
✅ Key Features:
✅ 28 Precision-Machined Components – Ensures exact fit and smooth operation in your AR-15 lower receiver
✅ No Fire Control Group or Grip – Ideal for custom builds and performance upgrades
✅ Durable Construction – Engineered from rugged materials to handle repeated, high-volume use
✅ Custom-Build Ready – Pair with your favorite trigger, hammer, and grip for full personalization
✅ Universal Compatibility – Designed to work with all mil-spec AR-15 lower receivers
✅ Reliable Performance – Perfect for builders, enthusiasts, and professional gunsmiths
✅ Everything You Need, Nothing You Don’t – Complete your lower with the most essential parts
What’s Included:
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✅ Bolt Catch
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✅ Bolt Catch Plunger
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✅ Bolt Catch Roll Pin
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✅ Bolt Catch Spring
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✅ Buffer Retainer Pin
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✅ Buffer Retainer Spring
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✅ Detent Springs (x2)
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✅ Disconnector (for reference, not needed without FCG)
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✅ Disconnector Spring (for reference, not needed without FCG)
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✅ Hammer Pin (for reference, not needed without FCG)
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✅ Hammer Spring (for reference, not needed without FCG)
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✅ Magazine Catch
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✅ Magazine Catch Spring
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✅ Magazine Catch Button
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✅ Pistol Grip Screw
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✅ Pistol Grip Lock Washer
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✅ Pivot Pin
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✅ Pivot Pin Detent
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✅ Safety Detent
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✅ Selector (Safety)
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✅ Selector Spring
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✅ Takedown Pin
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✅ Takedown Pin Detent
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✅ Trigger Pin (for reference, not needed without FCG)
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✅ Trigger Spring (for reference, not needed without FCG)
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✅ Trigger Guard
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✅ Trigger Guard Roll Pin
Ideal For:
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AR-15 custom builders looking for modular flexibility
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Shooters upgrading specific lower receiver components
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Firearm enthusiasts who want mil-spec compatibility
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Gunsmiths and professionals needing reliable spare parts
Upgrade your build today with the trusted precision of Presma. Built to perform. Engineered to last.