Description

AR-15 Lost Parts Kit

Never let a lost detent or spring stall your AR-15 build again. The A1Armory AR-15 Lost Parts Kit is a must-have collection of the most commonly misplaced lower receiver components. Crafted to mil-spec standards and proudly 100% made in the USA, this comprehensive set is perfect for builders, gunsmiths, and AR enthusiasts who demand reliability, precision, and convenience.

✅ Comprehensive & Convenient

Whether you're building a new rifle or repairing a lower, this kit ensures you always have the essential small parts within reach.

Kit Includes & Features

✅ Buffer Retainer Pin – Nitride Finish
• Retains the buffer securely in the buffer tube
• Nitride coating for enhanced wear and corrosion resistance

✅ (4) Takedown / Pivot Pin Detents – Cadmium Plated
• Smooth pivot and takedown pin action
• Cadmium plating for excellent corrosion protection

✅ (2) Selector Detents – Cadmium Plated
• Ensures crisp selector engagement
• Built to last with a corrosion-resistant finish

✅ (2) Ejector / Selector Springs
• Maintains spring tension for reliable ejection and selector performance

✅ (2) Disconnect Springs
• Maintains correct disconnector function
• Precision wound for durability and reliability

✅ (6) Takedown / Pivot Pin Springs
• Generous quantity for multiple builds or future replacements
• Heavy-duty spring tension for long-lasting performance

✅ (1) Buffer Retainer Spring
• Works in tandem with the buffer retainer for secure buffer retention

✅ (1) Bolt Catch Detent – Nitride Finish
• Assures reliable bolt catch function
• Finished for durability in demanding environments

✅ (2) Bolt Catch Springs
• Provides positive and consistent bolt catch engagement

✅ (2) Extractor Springs
• Essential for reliable extraction under rapid fire
• Built for resilience and consistent cycling

✅ (2) Extractor Inserts
• Maintains extractor function and adds extra support

✅ (2) Extractor O-Rings
• Enhances extractor tension and reliability

✅ (2) Firing Pin Retaining Pins
• Secures your firing pin in place
• Vital for safe and dependable function

✅ 100% Made in the USA
• Every component is precision manufactured in the United States
• Supports American manufacturing and strict quality standards

Why Choose A1Armory’s Lost Parts Kit?

Don’t waste time digging through carpet or scavenging for individual springs and detents. This kit saves builds, backups, and range time. Perfect for your bench, bug-out bag, or tool roll.

Stay ready. Stay equipped. Add the AR-15 Lost Parts Kit from A1Armory to your cart and keep your rifle running at peak performance — no matter what.