Sig Sauer 1911 Nightmare .45 Pistol

Posted: 02/05/2026

Sig Sauer 1911 Nightmare .45 Pistol

The Sig Sauer 1911 Fastback Nightmare is a .45 ACP, single-action (SAO) pistol featuring a distinctive, rounded “fastback” frame for concealed carry, a stainless steel frame/slide with a durable Black Nitron finish, and contrasting stainless steel controls. It commonly features a 4.2-inch barrel, black G10 grips, and SIGLITE night sights.

Specifications:

  • Caliber: .45 ACP
  • Barrel Length: 4.2 inches (107mm)
  • Overall Length: 7.7 inches (193mm – 221mm depending on variant)
  • Height: 5.5 inches
  • Width: 1.4 inches
  • Weight (Empty): Approx. 38.8 oz (1.1 kg)
  • Capacity: 8+1 Rounds (includes two 8-round steel magazines)
  • Action: SAO (Single Action Only)
  • Sights: SIGLITE Low-Profile Night Sights
  • Grips: Black G10 Double Diamond
  • Material: Stainless Steel Frame & Slide with Nitron Finish