Wilson Combat has supplied professionals and serious shooters with some of the most reliable and durable .45 auto magazines for over 30 years. Trusted by elite U.S. Army SPEC OPS units, FBI SWAT, Thunder Ranch, and firearms experts worldwide, these magazines set the standard for inherent reliability, long-term durability, and the ability to remain fully loaded without damage. Each magazine spring is fabricated from high-tensile strength heavy-duty wire, providing long service life, smooth feeding, and positive slide stop engagement. The magazine bodies are constructed from 0.025-inch thick, aircraft-grade certified 17-7 PH stainless steel, heat treated for maximum durability and corrosion resistance. Tight dimensional tolerances guarantee consistent drop-free fit and smooth round feeding when used with properly specified pistols and ammunition. The ETM design incorporates a patented extended-skirt, anti-tilt all-metal follower to ensure positive slide lockback and reliable feeding in all .40 S&W 1911 pistols. Its removable 0.35-inch plastic base pad allows for easy maintenance and versatility with different base pad options. Combined with the stainless steel tube, heavy-duty spring, and precise engineering, Wilson Combat magazines deliver proven reliability and durability that surpass any other magazine on the market, maintaining full functionality even after extended periods fully loaded.