[1] The Strayer-Voigt system is called modular because the lower grip and trigger guard, which is made of carbon steel, stainless steel, titanium or aluminum, is a separate component from the metal upper portion of the frame that comprises the dust cover and frame rails.
Strayer-Voigt, Inc. was started in June 1994 when Sandy Strayer left STI International Inc to form his own company.
Sandy Strayer joined forces with Michael Voigt, a professional shooter and gunsmith, to manufacture and market their own line of modular frame 1911s.
The original polymer grip was formerly a shared patent design between Strayer-Voigt and STI International Inc.
They are produced in a variety of calibers, including .38 Super, 9x23mm Winchester, .40 S&W, .45 ACP, 10mm Auto, and .357 Sig.