The Umarex Colt Defender 4.5mm CO₂ BB Air Pistol (Model 5.8310) is a compact and durable airgun replica inspired by the iconic Colt Defender pistol. Designed for reliability and realistic handling, this air pistol features a full-metal frame and slide, giving it authentic weight and balance.

Powered by a standard 12-gram CO₂ cartridge, the pistol fires 4.5mm (.177) steel BBs with consistent performance. The CO₂ capsule is housed within the grip and can be replaced quickly, making the pistol convenient for extended shooting sessions.

The Colt Defender uses a 16-round integrated magazine and operates with a double-action trigger system, allowing rapid and smooth firing during target practice or recreational shooting.

With a muzzle velocity of up to 134 m/s (approximately 440 fps) and energy below 3.0 Joules, the pistol delivers reliable power while remaining suitable for controlled shooting environments.

For added versatility, the pistol includes a Weaver / Picatinny accessory rail beneath the barrel for mounting tactical lights or lasers. A manual safety provides secure handling during transport and storage.

Combining realistic styling, durable construction, and dependable CO₂ performance, the Umarex Colt Defender is an excellent option for airgun enthusiasts, collectors, and shooters looking for a compact BB pistol for training and target shooting.

Key Features

• Licensed Colt Defender style air pistol
• 4.5mm (.177) steel BB calibre
• Powered by 12g CO₂ cartridge
• Full metal frame and slide for realistic weight
• 16-round integrated magazine
• Double-action trigger system
• Manual safety for safe handling
• Weaver / Picatinny accessory rail for lights or lasers
• Compact and durable design
• Ideal for target practice and recreational shooting

Specifications

Brand: Umarex
Model: Colt Defender
Model Number: 5.8310
Calibre: 4.5mm (.177) BB
Ammunition: Steel BBs
Power Source: 1 × 12g CO₂ cartridge
Magazine Capacity: 16 rounds
Velocity: up to 134 m/s (≈440 fps)
Energy: < 3.0 Joules
Trigger: Double Action Only
Overall Length: 177 mm
Barrel Length: 108 mm
Weight: 724 g
Construction: Full metal frame and slide
Rail: Weaver / Picatinny accessory rail