Stern Defense SD-BU45 .45 ACP Bolt Carrier Group Black

Description

Product Overview

The Stern Defense AR-15 SD-BU45 .45 ACP Bolt Carrier Group is purpose-built for reliable operation in big-bore .45 ACP AR-15-style PCC builds. Machined from 8620 AISI steel with a 4140 billet-steel extractor and finished in manganese-phosphate for a durable Black coating, this carrier assembly is designed to cycle and eject large-diameter .45 ACP brass when paired with the correct upper receiver ejection-port configuration and buffer weight.

Key Features

• Machined from 8620 AISI steel for durable, long-term use in .45 ACP PCC builds
• 4140 billet-steel extractor for dependable ejection
• Glock-cut carrier design for compatibility with the intended AR-15 .45 ACP upper ecosystem
• Includes firing pin assembly and extractor components for a complete drop-in carrier group
• Manganese-phosphate Black finish for corrosion resistance and wear durability
• Requires an enlarged ejection port and an 11-ounce or heavier buffer for reliable cycling with .45 ACP brass

Build your .45 ACP AR-15 platform with a carrier group engineered for proper clearance and reliable ejection—choose the Stern Defense SD-BU45 for dependable PCC operation.