This top Rail and Buttstock Adapter are compatible to Nerf Rival Forerunner blaster, the rails are just fit design you need to screw it well on the blaster. Addition top rail gives your blaster tactically advance install any scopes of accessories.
The redesigned buttstock adapter allow you to change your favorite buttstock to your Forerunner blaster. Install this adapter just by fitting and screws to fix it well. Select you favorite buttstock in our store and it is compatible to any Nerf type buttstocks.

We welcome other color print and just leave a message to us!