Can you tell the difference?

Look closely at the picture above.  Now, can you tell what that is?
Here are your choices:

1. It's an AR-15, the 'assault rifle' many presidential hopefuls wish to confiscate at gunpoint from American citizens.
2. It's a modern sporting rifle, and the single most common rifle owned by US citizens today.
3. It's the most common rifle used for competition in the US today.
4. It's the most common rifle used for home defense in the US today.
5. It's known as a 'Patrol Rifle' and used by nearly every police agency in the US today. 
6. It's the most popular rifle ever owned by US citizens, with sales outpacing everything else combined for the last 20 years. 
7. It's NOT a full auto M-4 used by the military as their primary weapon for soldiers worldwide.
8. It's NOT the choice of criminals, to the point hammers are more frequently used in crimes than the rifle pictured above. 

Well?