Amazon.com : 170 lbs WT-Goliath 75 Shoot (Steel Ball) Repeating Arrow Hunting Crossbow with 3 x 32 Scope (Arrows and Balls) : Sports & Outdoors
New Upgrade Style Mini Toys Gifts Powerful Mini Crossbow Stainless Steel Shooting Toy Including Installation Tools Fire Arrow and 4 Mm Steel Ball | Wish
NKOK Blastron CannonBall Blaster: Crossbow - 16"L #3843, Includes 12 Lightweight Foam Balls, Toy Shoots Up To 20 Feet, Children's Blaster, Pump Action & Sight, For Kids Ages 6+ - Walmart.com
Bullet-shooting crossbow - Wikipedia
Alternative projectiles
Mini Crossbow Made from Stainless Steel Launch 4mm Steel Ball or Tooth – Toytopone
Mini Crossbow Stainless Steel with 4 mm steel balls Innovative design – Toytopone
We designed a firing crossbows steel balls and arrows | Crossbow Nation