Dbst Bolt Rebuild Kit

The Doublestar Corp Dbst Bolt Rebuild Kit is a complete field-maintenance solution for AR-15 bolt carrier assemblies, providing operators with essential components to restore bolt function and extend the service life of the carrier group. This rebuild kit contains every wear item that typically requires replacement during standard maintenance cycles, making it an indispensable addition to any armorer's or serious shooter's maintenance kit.

The kit includes a precision extractor, extractor spring with bumper pad, a complete set of three gas rings, an O-ring, and an extractor pin. The extractor spring with integrated bumper pad maintains proper tension and prevents carrier tilt, while the gas rings regulate pressure cycling and reduce bolt carrier velocity extremes—critical for reliable function across variable ammunition specifications. These components wear progressively through normal operation; the Dbst kit supplies all five pieces needed to return a bolt to factory specification without sourcing individual parts from multiple vendors.

This rebuild kit addresses the needs of range shooters, military and law enforcement armorers, competitive shooters managing multiple rifles, and tactical professionals performing scheduled preventive maintenance. Whether troubleshooting extraction failures, rotating components on a duty weapon, or maintaining a training fleet, this kit eliminates guesswork and eliminates the delay of ordering individual parts. The compact package (2.5 x 0.5 x 3.5 inches, 0.06 lbs) fits easily into range bags, vehicle kits, or deployment gear.

AR-15 bolt maintenance is foundational to rifle reliability. Gas rings and extractors degrade under normal wear; the Doublestar bolt rebuild kit consolidates the most frequently replaced items into a single purchase, reducing downtime and ensuring consistent function across different ammunition types and shooting volumes.