Do they make a vertical grip that would mount to my handguard?
Here's handgauard on my rifle
Here's my handguard
http://www.bravocompanyusa.com/M4-Handguards-Black-p/bcm%20handguards%20m4%20black.htm
Here's handgauard on my rifle

Here's my handguard
http://www.bravocompanyusa.com/M4-Handguards-Black-p/bcm%20handguards%20m4%20black.htm