WE 5.1 TREX BK Gas Blowback Pistol – Black
£135.00
WE 5.1 TREX gas blowback pistol – compact CANiK-platform sidearm delivering 300fps with realistic alloy construction. Semi-automatic only. 22-round magazine included.
Out of stock
The WE 5.1 TREX is a modern compact gas blowback pistol built on the CANiK SFx RIVAL platform. It’s a no-nonsense secondary for CQB skirmishers, milsim support roles, and anyone seeking a reliable, lightweight sidearm with genuine metal controls.
Key Features
- Gas blowback operation – realistic slide cycling and feedback with every shot
- Alloy slide, barrel and controls – durable, responsive, reduced wear on internals
- 20mm Picatinny rail – mount optics, lights, or lasers for tactical flexibility
- Adjustable hop-up – accessed via slide removal for easy tuning and range optimisation
- Compact 20.5cm length – ideal for retention holsters and CQB environments
- Semi-automatic only – safe, legal, and site-compliant on any UK airsoft range
Real-World Use Cases
The TREX excels as a primary or secondary in medium- to close-range engagements. Its lightweight build (550g) makes it perfect for milsim players running extended operations, and the responsive blowback helps maintain accuracy and shot placement. The integral Picatinny rail opens up customisation—add a red dot for CQB dominance or a suppressor adapter for quieter work. Field stripping is intuitive, so maintenance between games is straightforward.
Technical Specifications
- Muzzle velocity: ~300fps (±10%) with 0.20g BBs
- Inner barrel: 4.5 inches (114mm)
- Length: 20.5cm
- Weight: ~550g
- Magazine capacity: ~22 rounds
- Power source: Green Gas
- Firing mode: Semi-automatic
- Construction: Alloy slide, barrel, and controls; steel pins and screws; aluminium magazine well extension; polymer frame and backstrap
- Rail system: 20mm Picatinny (pistol)
- Hop-up: Adjustable, accessed via slide removal
Compatibility & Upgrades
The WE 5.1 TREX uses standard gas blowback pistol magazines (low-capacity, 22-round type included). Green Gas is the standard propellant—ideal for UK indoor sites and moderate outdoor temperatures. The CANiK platform is well-supported in the aftermarket, so upgrade parts (springs, nozzles, inner barrels) are available if you want to fine-tune performance later. The 20mm rail accepts any standard accessory.
UK Legal & Site Notes
This pistol is semi-automatic only and complies with UK airsoft site regulations. Its 300fps output sits comfortably within most site FPS limits for pistols (typically 350fps max). Always confirm your local site’s rules before use, and carry a valid membership card or UKARA registration. Gas blowback pistols perform best in mild-to-warm weather; site chronographing is standard practice.
Order the WE 5.1 TREX from Airsoftdirect UK today and get a reliable, nimble sidearm that’ll serve you well across any game type.
| pa_platform-type | Pistol |
|---|---|
| pa_ukara-required | Yes,No, |
| pa_included-items | Magazine |
| pa_skill-level | Regular Player |
| pa_warnings | Lubrication is required |
| pa_fps | Approx.300fps ± 10%, using 0.20g BBs |
| pa_weight | Approx.0.55KG |
| pa_length | 20.5cm |
| Brand | WE |
| pa_colour | Black,Grey,Dual Tone, |
| pa_construction | Alloy outer barrel, slide and controls. Steel pins and screws. Aluminium magazine well extension. Polymer frame and backstrap. |
| pa_powered-by | Green Gas |
| pa_blowback-type | Gas Blowback |
| Platform | CANiK SFx RIVAL |
| pa_fire-modes | Semi Automatic |
| pa_shooter-configuration | Right Handed |
| pa_hop-up-type | On outer barrel, accessible when the slide is removed. |
| pa_hop-up-adjuster | Gear |
| pa_rail-system | 20mm Pistol Rail |
| pa_sight-type | Light enhancing front iron sight with anti-glare rear sight |
| pa_barrel-length | 4.5'' |
| pa_barrel-diameter | 6.08mm |
| pa_magazine-type | Gas,Low Capacity, |
| pa_magazine-capacity | Approx.22Rounds |
| pa_outer-barrel-thread | Female |
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