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Heizer Defense is a high-technology firearms manufacturer based in Pevely, Missouri, specializing in innovative concealed-carry pistols built with aerospace-grade materials and precision engineering. Founded by Charles K. Heizer, an engineer with over 50 years of aerospace manufacturing experience, the company applies military-grade design and manufacturing standards to create durable, all-metal firearms. The flagship PKO-45 semi-automatic pistol exemplifies this approach—a compact.45 ACP designed for responsible citizens and law enforcement seeking reliable personal protection. Heizer Defense draws on decades of expertise from its parent company, Heizer Aerospace, which manufactures critical components for leading aerospace firms and NASA. Every firearm undergoes rigorous testing before release. Browse Heizer Defense pistols for sale and discover why discerning shooters choose precision-engineered performance and innovative design.
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