I've seen my fair share of crap on rifles. Tactical lights, infrared aiming devices, monster scopes on 16" tactical AR's, I've even used a bottle opener built into a Galil bipod, but this takes the cake!
yes, that's right, a cupholder for your rifle.
2nd Amendment to the Constitution of The United States of America
A well regulated militia, being necessary to the security of a free state, the right of the people to keep and bear arms, shall not be infringed.
"I ask sir, what is the militia? It is the whole people except for a few politicians."
- George Mason (father of the Bill of Rights and The Virginia Declaration of Rights)