Colt Defender Series 90 Lightweight .45 ACP 3-inch 1911 Pistol (1999) – Alloy Frame, Fixed 3-Dot Sights, 6+1
The Colt Defender Series 90 Lightweight is a compact .45 ACP 1911 built for carry-friendly dimensions and proven controls. This 1999 example features a 3-inch bushingless bull barrel, an alloy frame to reduce weight, and low-mount fixed 3-dot sights. Its matte two-tone finish, commander-style rowel hammer, and lightweight three-hole trigger round out a practical subcompact 1911 configuration made in the United States.
Condition
Overall Condition: Fair condition, showing extensive signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: The slide and frame show widespread pitting and blemishes, with scratches visible in the finish.
What’s Included
- Colt Defender Series 90 Lightweight .45 ACP pistol
- One 6-round single-stack Officer-length 1911 magazine (steel body)
This Defender uses a 3-inch, bushingless bull barrel with a cone profile and a reverse recoil spring plug, optimized for the compact slide length. The slide has rear cocking serrations only and a lowered/flared ejection port for reliable clearance.
The lightweight alloy frame keeps carry weight down while retaining 1911 ergonomics. It uses an Officer/Defender-length grip frame, a smooth front strap, and black Hogue wraparound finger-groove rubber grips with molded Hogue circular logos for a secure hold.
Sighting is straightforward with low-mount fixed 3-dot sights in dovetails: a white-dot dovetailed front and a two-dot fixed rear with a serrated face. Controls are classic single-action only with a left-side thumb safety, grip safety, and Series 90 firing pin block.
Additional features include a lightweight three-hole trigger and a commander-style rowel hammer. Capacity is 6+1 with the included single-stack magazine. This pistol was manufactured in 1999 in the United States and wears a matte two-tone finish with a matte light gray slide over a matte alloy-tone frame.




