Legends M1A1 (Thompson Sub Machine Gun) CO2 4.5mm BB Blowback Air Gun by UMAREX
The Legends M1A1 is Umarex going all-in on historical replica territory. It’s based on the iconic Thompson submachine gun, a design that defined the 1920–1950 era and still shows up constantly in films and historical displays today.
This CO2 version is less about modern practicality and more about full-scale realism, weight, and presence. And yes, it absolutely commits to the bit.
Key Features
- Full metal construction with realistic weight and handling
- Strong blowback action
- Authentic WWII-era M1A1 styling
- 30-round magazine
- Powered by 2x 12g CO2 capsules
- Single action trigger
- Battle-worn style finish for period-correct appearance
Performance / Use Case
This is not subtle, efficient, or particularly light on gas. It’s designed for realism first, shooting second.
The dual CO2 setup gives it enough power to cycle that heavy bolt system convincingly, and the blowback is a big part of the experience. It’s more about feel and immersion than accuracy or efficiency.
As a BB platform, it’s fine for short-range plinking, but realistically, most people aren’t buying this to shoot tiny groups. They’re buying it because it feels like holding a piece of history, just without the legal headaches.
Build & Design
At 3.4kg and over 800mm long, this is a full-scale, full-weight replica that does not feel like a toy in any sense. The heft is a big part of what makes it work, especially with the heavy metal blowback system.
The worn finish is deliberately styled to look like service-used wartime firearms, which gives it a more authentic character compared to clean, modern replicas.
Controls and layout are faithful to the original Thompson design, which means it’s simple, straightforward, and very period-specific in how it operates.
Specifications
- Power Source: 2x 12g CO2
- Calibre: 4.5mm BB
- Magazine Capacity: 30 rounds
- Trigger: Single Action
- Safety: Lever
- Length: 805 mm
- Weight: 3435 g
The M1A1 is all about immersion. It’s heavy, loud (in CO2 terms), and deliberately old-school in both design and operation.
It’s not efficient, it’s not compact, and it’s definitely not subtle. But that’s exactly the point. If you want a realistic, full-weight historical replica that actually feels like the real platform in the hand, this is one of the more convincing options out there.
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