The 
Mantis 80lb resin self-cocking crossbow by Anglo Arms is a lightweight, entry-level pistol crossbow known for its easy, safe self-cocking mechanism, durable resin body, and fibreglass limb, making it popular for recreational shooting, coming with aluminum bolts and an adjustable grip for comfort and versatile handling. 
Key Features:
Draw Weight: 80lbs.
Construction: Lightweight resin body with a high-tech fibreglass limb.
Cocking Mechanism: Simple and safe self-cocking system that automatically engages safety.
Grip: Adjustable tactical arm grip for user comfort and versatile one or two-handed use.
Safety: Auto-safety mechanism and bolt retainer.
Included: Typically comes with 3 aluminum bolts, limb tips, string, and a paper target. 
What it's For:
Ideal for beginners or casual shooters due to its ease of use and lightweight design.
Suitable for plinking or target practice at short ranges (around 10-20 meters). 
How it Works (Self-Cocking):
Hold the front/limb and rear lever while bending down the middle.
Depress the locking latch to engage the cocking action.
The string is pulled back, and the auto-safety engages for safe operation.