The Wilson Combat 09400150SP: Xtreme Defense lead-free Fluid Transfer Monolithic (XD FTM) is revolutionising the perception of self-defense bullets. Mirroring the Xtreme Penetrator, its progressive nose geometry allows for deep, straight penetration, generating a permanent wound cavity diameter that exceeds most expanding bullets.In addition, this bullet is composed of solid copper, allowing it to effectively penetrate barriers. It's an environmentally-friendly choice that inflicts considerable tissue damage upon impact. Unlike conventional hollow point bullets, the Xtreme Defense still performs optimally even when penetrating barriers such as drywall or heavy clothing before reaching the intended target.