SOG Pentagon OTF Blackout Knife 3.79" Blade Black

The SOG Pentagon OTF Blackout Knife features a 3.79-inch blade designed to deliver rapid, reliable one-handed deployment in field and tactical environments. Built by SOG Specialty Knives Inc., this American-made out-the-front (OTF) automatic switchblade combines proven engineering with premium materials to meet the demands of professionals who depend on instant blade access. The Pentagon OTF represents decades of SOG's expertise in designing fast-opening tactical knives for law enforcement, military personnel, and serious knife users.

This OTF knife features SOG's Dynamic Lock-up System, which redefines both opening reliability and blade lock strength in the OTF category. The blade is forged from CRYO S35VN stainless steel—a premium grade chosen for superior edge retention, corrosion resistance, and ease of maintenance. The hard-anodized aluminum handle provides durability and a secure grip during extended use, while the compact 3.5-inch closed length makes the knife practical for pocket carry or gear stowage. The blackout finish eliminates reflectivity, a critical detail for tactical applications.

The Pentagon OTF is engineered for professionals who require speed and dependability in critical moments—patrol officers needing rapid response capability, field personnel operating in remote environments, or specialized operators who demand high-end steel and proven deployment technology. The fully automatic mechanism fires to full blade extension with a single thumb or finger activation, eliminating the fumbling that manual blades introduce under pressure. This knife solves the core problem facing OTF knife users: combining true reliability with the speed that matters when seconds count.

OTF automatic knives occupy a specialized niche in the tactical knife market. They excel where manual folding knives are too slow and fixed-blade knives are impractical. The Pentagon OTF differentiates itself through SOG's reputation for field-tested engineering and the robustness of S35VN steel—a material standard in premium production knives. This blade steel resists wear and corrosion better than standard stainless grades while holding a sharp edge longer, reducing maintenance demands in the field.