45 GAP Ammunition was especially created for Glock and "GAP" essentially stands for "Glock Automated Pistol". Engineer Ernest Durham designed the forty five Hole round being a cartridge that would be as highly effective as 45 ACP but would've a more powerful circumstance head to reduce the probability that the https://tacticalrounds.com/product-category/handgun-ammo-for-sale/45-gap-ammo/