Stern Defense 004SDBU45D1M .45 ACP Bolt 8620 Steel

Description

The Stern Defense 004SDBU45D1M bolt is built for AR-15/M16 platforms configured to operate with .45 ACP magazines and Glock-pattern uppers. Constructed from 8620 AISI steel and finished in mag-phosphate, the assembly is supplied fully assembled with the primary subcomponents installed. It is designed to work with Colt SMG and Glock magazines and is compatible with standard AR-15/M16 charging handles.

Key Specifications

• Constructed from 8620 AISI steel.
• Finished in Mag-Phosphate.
• Designed for .45 ACP use in AR-style platforms and Glock-pattern uppers.
• Compatible with Glock-pattern uppers and standard AR-15/M16 charging handles.
• Functions with Colt SMG and Glock magazines.
• Ships fully assembled with firing pin, firing pin spring, retaining pin, extractor, and extractor spring installed.
• This .45 bolt uses the new bolt design optimized for single-stage triggers with short resets.
• Overall dimensions are 2.30 x 2.35 x 9.35 as provided by the manufacturer.
• Categorized as an AR-15 accessory suitable for upgrades or builds.
• Manufactured in the USA.

Whether you are assembling a dedicated .45 ACP AR-style upper or replacing a worn component, this Stern Defense bolt provides a component-complete, ready-to-install option that simplifies parts sourcing. The combination of 8620 steel and a mag-phosphate finish delivers a durable working surface for routine service, while compatibility with Glock-pattern uppers and common magazines makes it a practical choice for builders and armorers focused on reliable integration.