The Colt M45A1 Marine CQBP is a 1911-style semi-automatic pistol chambered in .45 ACP. It carries the USMC Close Quarter Battle Pistol designation and is built to those specifications: 5-inch barrel, 7+1 capacity, single-action-only trigger, Novak 3-dot night sights, G10 Desert Tan grips, ambidextrous thumb/grip safety, and a Decobond Brown coating over a stainless steel frame. Weight is 40 oz (2.5 lbs). 
 

Key Specifications 

• Brand: Colt Mfg 
• Model Name: M45A1 Marine 
• Caliber: .45 ACP 
• Action: Single Action Only (SAO) 
• Capacity: 7+1 Rounds 
• Barrel Length: 5 inches 
• Weight: 2.5 lbs (40 oz) 
• Sights: Novak 3-Dot Night Sights 
• Grip Material: G10 Desert Tan 
• Safety Type: Ambidextrous Thumb Grip Safety 
• Finish: Decobond Brown Coating 
• Condition: New in Box 
   

Detailed Features 

 
The stainless steel frame is finished with Decobond Brown, which resists wear and corrosion better than traditional blued finishes. Novak night sights allow fast target acquisition in low light, a meaningful spec for a pistol with a defense pedigree. The G10 Desert Tan grips are textured for positive control whether your hands are dry or wet. The ambidextrous safety runs the same way for left- or right-handed shooters. A 5-inch barrel at .45 ACP gives full powder burn and the consistent velocity that caliber is known for. 
 

Target Audience 

Shooters who want a .45 ACP 1911 with documented military provenance and the corresponding build spec. Competitive 1911 shooters, collectors interested in USMC service-variant pistols, and home defense users who prefer the .45 ACP platform. 
 

Usage Scenarios 

The night sights and .45 ACP caliber make this a credible home defense option. At range sessions it's accurate at medium distances with the crisp single-action trigger. The 40 oz weight is noticeable for everyday carry but manageable for range and duty use.

Owners of the M45A1 generally focus on the USMC build spec as the selling point. The military contract origin means the construction tolerances and components meet documented standards rather than just marketing claims. Build quality and accuracy comments are consistently positive, with owners noting the pistol shoots well at both short and medium ranges.

The Novak night sights get specific praise for practical low-light visibility. Ergonomics are well-regarded. The controls are intuitive for anyone familiar with the 1911 platform. The ambidextrous safety earns particular mention from left-handed shooters.

Critiques are predictable for the platform: at 40 oz it's heavier than modern polymer-frame alternatives, which matters most for carry applications. Price is the other recurring friction point. The M45A1 costs noticeably more than comparable .45 ACP pistols, and some buyers debate whether the USMC spec justifies the premium. Maintenance is occasionally mentioned as more involved than striker-fired designs, though that's inherent to the 1911 system. Most owners who commit to the pistol are satisfied with what they got.