Firearms

SIG Sauer 1911 Fastback Nightmare .45 ACP 4.2-inch

Schematic

Open full size ↗

Specifications

About

Notable Variants

Aftermarket Ecosystem

Historically Significant Examples

Serial Number Data

Production data from factory records and collector research. Year ranges are approximate for pre-1968 firearms.

Years	Serial Range	Count	Factory	Country	Confidence

The Fastback Nightmare featured SIG's rounded heel on the frame — the Fastback treatment — combined with an IWB-optimized carry profile, night sights, and a Nitron finish. Purpose-engineered for concealed carry with reduced printing.

Type: Pistol

Action: Semi-Automatic

Caliber: .45 ACP

Capacity: 7

Year introduced: 2012, Germany/USA

Weight: 34 oz

Overall length: 7.7"

Status: Discontinued

Intended use: Carry, Concealed Carry