This thing is 75$ at Toy’R’Us.

• Build your own blaster with the motorized Nerf Modulus ECS-10 blaster
• Flexible blaster has more than 30 combinations
• Features targeting scope, drop grip and dual-rail barrel
• Blaster can launch the included darts at targets up to 90 feet away
• Blaster’s banana clip holds up to 10 darts

LINK