Underwood 40sw 115gr - Xtreme Defender 20rd 10bx/cs

Underwood 40SW 115gr Xtreme Defender ammunition delivers purpose-built performance for law enforcement, armed security, and civilian self-defense applications. Each box contains 20 rounds engineered to meet the demands of critical-duty scenarios where barrier penetration, expansion, and reliability are non-negotiable. This cartridge represents a significant advancement in .40 caliber defensive loading, addressing the specific performance gaps that tactical professionals identified in traditional hollow-point designs.

The Xtreme Defender projectile features a proprietary solid copper construction that eliminates the fragmentation and inconsistency problems associated with conventional bonded-core ammunition. At 115 grains, this round achieves optimal velocity and energy transfer through intermediate barriers—clothing, drywall, and vehicle glass—without over-penetration that risks collateral damage or overpressure in confined spaces. The solid copper design ensures consistent expansion geometry, superior weight retention, and terminal ballistics that exceed FBI protocol testing standards, making it a proven choice for duty carry in semi-automatic platforms like the S&W M&P, Glock Gen 3/4/5, and HK USP series.

Law enforcement agencies and professional armed citizens rely on Underwood Xtreme Defender for its track record of reliable chambering in both standard and short-barreled platforms. Bulk pricing (10 boxes per case) supports regular qualification and practical training without excessive cost per round—critical for maintaining proficiency. Underwood's quality control and consistency ensure this ammunition functions reliably across the widest range of .40 SW firearms, from duty pistols to compact backup weapons, making it an investment in both performance and readiness.