WE-Tech Hi-Capa 5.1 T-REX Black CO2 Air Gun (4.5mm Steel BB)
The WE-Tech Hi-Capa 5.1 T-REX Black is a high-performance, competition-inspired CO2 blowback air gun built on the popular Hi-Capa 5.1 platform. Designed to fire 4.5mm steel BBs, its striking black ported slide, silver trigger and hammer, black grip area, and flared magwell with silver accents deliver a distinctive two-tone black-and-silver custom look for backyard target practice, training, and collection display.
Powered by a reliable CO2 magazine, the T-REX Black features a crisp gas blowback system for realistic slide action and recoil impulse. The ported and skeletonized slide reduces moving mass for efficient cycling, while the ergonomic textured grip, fiber-optic front sight, adjustable rear sight, and frame-mounted accessory rail provide complete tactical utility and control.
Key Features
- WE-Tech Hi-Capa 5.1 T-REX Black CO2 blowback air gun.
- Fires 4.5mm steel BBs (steel pellets/rounds) exclusively.
- Hi-Capa 5.1 / 2011-style competition platform.
- CO2-powered blowback system with realistic cycling slide action.
- Safe and semi-automatic firing modes.
- Black ported and skeletonized slide with lightening-cut styling.
- Silver trigger, hammer, and magwell accents with a flared magwell.
- Fiber-optic front sight with an adjustable rear sight.
- Heavy-duty metal slide, frame, and outer barrel with textured polymer grip panels.
- Frame-mounted accessory rail for tactical lights or lasers.
- Detachable 30-round CO2 magazine.
Specifications
| Brand | WE-Tech |
|---|---|
| Model | Hi-Capa 5.1 T-REX Competition CO2 (Black) |
| SKU | WE-45-H001WET-BK |
| Product Type | CO2 Blowback Air Gun (4.5mm BB) |
| Platform | Hi-Capa 5.1 / 2011 Style |
| Power Source | CO2 Cartridge (via CO2 Magazine) |
| Operation | Gas Blowback (GBB) |
| Firing Modes | Safe / Semi-Automatic |
| Caliber / Ammo | 4.5mm Steel BBs only |
| Length | 22.7 cm |
| Gun Weight (with Mag) | 1042 g |
| Hop-Up | Yes, Adjustable |
| Magazine Type | Detachable CO2 Hi-Capa Magazine |
| Magazine Capacity | 30 Rounds |
| Muzzle Velocity (FPS) | 300–330 FPS (dependent on temperature, CO2 cartridge pressure, and BB weight) |
| Construction | Metal slide, frame, trigger, and outer barrel with textured grip components |
| Sights | Fiber-optic front sight with adjustable rear sight |
| Accessory Mount | Frame-mounted accessory rail |
| Color | Black slide and frame with silver accents and black grip area |
Package Includes
- 1 × WE-Tech Hi-Capa 5.1 T-REX Black CO2 Air Gun Pistol
- 1 × 30-Round CO2 Magazine
- 1 × User Manual
Important Notes & Disclaimers
- Ammunition Warning: This air gun fires 4.5mm steel BBs. Do NOT use 6mm plastic airsoft BBs, as this will cause severe internal damage and jams.
- CO2 cartridges and 4.5mm steel BBs are not included unless otherwise specified.
- FPS Disclaimer: Muzzle velocity (FPS) is highly dependent on various factors, including: Temperature, Gas/CO2 Type, Hop-Up Adjustment, and BB Quality & Weight.
- Always wear properly rated shooting glasses or ANSI-rated eye protection when operating this air gun.
- Never display or use air gun replicas in public places. Transport strictly in a locked case or bag.
- Comply with all local laws, age limits, and regulations regarding air guns and BB pistols.
Frequently Asked Questions
What does this airgun shoot?
The WE-Tech Hi-Capa 5.1 T-REX Black GBB Air Gun Pistol is a 4.5mm CO2 airgun that fires 4.5mm steel BBs. It is a CO2-powered replica for target shooting and training where permitted — it is not a 6mm airsoft gun, and airsoft BBs must not be used in it.
What is the muzzle velocity?
Approximately 300–330 FPS as specified for this model. Actual velocity varies with CO2 temperature, cartridge condition, and how full the cartridge is — expect the first shots on a fresh cartridge to run strongest.
How is it powered?
It uses a 12g CO2 cartridge housed in the magazine or grip, depending on the model. Remove the cartridge for storage — leaving CO2 under pressure for long periods wears the seals.
What is included, and what do I need separately?
The package contents are listed in the description above. BBs and gas are not included and are sold separately.
What warranty and shipping cover this item?
It is covered by the Airgrix 30-day limited warranty and ships from our California warehouse. At $145.99 it qualifies for free US shipping on its own (free on orders $59+). Returns are handled under the store returns policy — see our Ordering, Shipping & Warranty FAQ page for the details.
WE-Tech Hi-Capa 5.1 T-REX Black GBB Air Gun Pistol
WE-Tech Hi-Capa 5.1 T-REX Black GBB Air Gun Pistol
📦 Ships from Los Angeles, CA 🚚 Delivery 2–5 days
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WE-Tech Hi-Capa 5.1 T-REX Black CO2 Air Gun (4.5mm Steel BB)
The WE-Tech Hi-Capa 5.1 T-REX Black is a high-performance, competition-inspired CO2 blowback air gun built on the popular Hi-Capa 5.1 platform. Designed to fire 4.5mm steel BBs, its striking black ported slide, silver trigger and hammer, black grip area, and flared magwell with silver accents deliver a distinctive two-tone black-and-silver custom look for backyard target practice, training, and collection display.
Powered by a reliable CO2 magazine, the T-REX Black features a crisp gas blowback system for realistic slide action and recoil impulse. The ported and skeletonized slide reduces moving mass for efficient cycling, while the ergonomic textured grip, fiber-optic front sight, adjustable rear sight, and frame-mounted accessory rail provide complete tactical utility and control.
Key Features
- WE-Tech Hi-Capa 5.1 T-REX Black CO2 blowback air gun.
- Fires 4.5mm steel BBs (steel pellets/rounds) exclusively.
- Hi-Capa 5.1 / 2011-style competition platform.
- CO2-powered blowback system with realistic cycling slide action.
- Safe and semi-automatic firing modes.
- Black ported and skeletonized slide with lightening-cut styling.
- Silver trigger, hammer, and magwell accents with a flared magwell.
- Fiber-optic front sight with an adjustable rear sight.
- Heavy-duty metal slide, frame, and outer barrel with textured polymer grip panels.
- Frame-mounted accessory rail for tactical lights or lasers.
- Detachable 30-round CO2 magazine.
Specifications
| Brand | WE-Tech |
|---|---|
| Model | Hi-Capa 5.1 T-REX Competition CO2 (Black) |
| SKU | WE-45-H001WET-BK |
| Product Type | CO2 Blowback Air Gun (4.5mm BB) |
| Platform | Hi-Capa 5.1 / 2011 Style |
| Power Source | CO2 Cartridge (via CO2 Magazine) |
| Operation | Gas Blowback (GBB) |
| Firing Modes | Safe / Semi-Automatic |
| Caliber / Ammo | 4.5mm Steel BBs only |
| Length | 22.7 cm |
| Gun Weight (with Mag) | 1042 g |
| Hop-Up | Yes, Adjustable |
| Magazine Type | Detachable CO2 Hi-Capa Magazine |
| Magazine Capacity | 30 Rounds |
| Muzzle Velocity (FPS) | 300–330 FPS (dependent on temperature, CO2 cartridge pressure, and BB weight) |
| Construction | Metal slide, frame, trigger, and outer barrel with textured grip components |
| Sights | Fiber-optic front sight with adjustable rear sight |
| Accessory Mount | Frame-mounted accessory rail |
| Color | Black slide and frame with silver accents and black grip area |
Package Includes
- 1 × WE-Tech Hi-Capa 5.1 T-REX Black CO2 Air Gun Pistol
- 1 × 30-Round CO2 Magazine
- 1 × User Manual
Important Notes & Disclaimers
- Ammunition Warning: This air gun fires 4.5mm steel BBs. Do NOT use 6mm plastic airsoft BBs, as this will cause severe internal damage and jams.
- CO2 cartridges and 4.5mm steel BBs are not included unless otherwise specified.
- FPS Disclaimer: Muzzle velocity (FPS) is highly dependent on various factors, including: Temperature, Gas/CO2 Type, Hop-Up Adjustment, and BB Quality & Weight.
- Always wear properly rated shooting glasses or ANSI-rated eye protection when operating this air gun.
- Never display or use air gun replicas in public places. Transport strictly in a locked case or bag.
- Comply with all local laws, age limits, and regulations regarding air guns and BB pistols.
Frequently Asked Questions
What does this airgun shoot?
The WE-Tech Hi-Capa 5.1 T-REX Black GBB Air Gun Pistol is a 4.5mm CO2 airgun that fires 4.5mm steel BBs. It is a CO2-powered replica for target shooting and training where permitted — it is not a 6mm airsoft gun, and airsoft BBs must not be used in it.
What is the muzzle velocity?
Approximately 300–330 FPS as specified for this model. Actual velocity varies with CO2 temperature, cartridge condition, and how full the cartridge is — expect the first shots on a fresh cartridge to run strongest.
How is it powered?
It uses a 12g CO2 cartridge housed in the magazine or grip, depending on the model. Remove the cartridge for storage — leaving CO2 under pressure for long periods wears the seals.
What is included, and what do I need separately?
The package contents are listed in the description above. BBs and gas are not included and are sold separately.
What warranty and shipping cover this item?
It is covered by the Airgrix 30-day limited warranty and ships from our California warehouse. At $145.99 it qualifies for free US shipping on its own (free on orders $59+). Returns are handled under the store returns policy — see our Ordering, Shipping & Warranty FAQ page for the details.
Age & Legal Notice
You must be 18 years or older to purchase airsoft products. Airsoft regulations vary by state and locality — please check your local laws before ordering. By completing your purchase, you accept full responsibility for the lawful use, possession, and storage of this product.
