SIG Sauer P365-XMACRO 21rd Extended Magazine 9mm Black

The SIG Sauer P365-XMACRO 21-round extended magazine transforms the compact P365 platform into a higher-capacity carry option without sacrificing concealability. This factory magazine extends the grip length to accommodate more rounds while maintaining the pistol's slim profile that made the P365 series popular among concealed carriers.

What Makes This Different

The P365-XMACRO magazine bridges the gap between subcompact capacity and full-size performance. Standard P365 magazines hold 10-12 rounds, while this extended version nearly doubles that capacity to 21 rounds of 9mm ammunition. The magazine maintains SIG's reputation for reliability while adding substantial firepower to the platform. Factory construction ensures proper fit, feed reliability, and durability compared to aftermarket alternatives.

Key Features

• 21-round capacity for 9mm Luger ammunition
• Factory SIG Sauer construction with steel body and polymer baseplate
• Compatible with P365-XMACRO pistols and P365 variants with grip module compatibility
• Extended baseplate design for improved grip purchase and control
• Witness holes for round count verification
• Heat-treated steel spring for consistent feeding
• Black finish matches standard P365 series aesthetics

This magazine performs reliably across various ammunition weights and bullet profiles commonly used in 9mm applications. The extended capacity makes it suitable for competitive shooting, duty carry where permitted, and home defense scenarios where reload frequency matters. The steel construction and factory tolerances ensure consistent feeding even under rapid-fire conditions or adverse environmental factors.

Technical Specs

• Caliber: 9mm Luger
• Capacity: 21 rounds
• Construction: Steel body with polymer components
• Compatibility: SIG P365-XMACRO, compatible P365 variants
• Finish: Black oxide
• Weight: Approximately 4.2 oz (empty)
• Country of Origin: USA
• Part Number: 8901594

Factory magazines eliminate compatibility concerns and feeding issues often associated with aftermarket alternatives. SIG's quality control standards ensure this magazine meets the same specifications as those shipped with new pistols. The increased capacity significantly extends shooting time between reloads for training or defensive applications.