round 3 

"And now Mr. lonely Neo-Nazi bot and his lonely little posse have decided to start for round three of this argument.
Let's get ready to rumble!"

I don't think that is Neo.

round 3 by Just an innocent bystander April 30, 2005

3 round burst 

A mode of fire found on various assault rifles in the world. Most popular of which is the M16A2 used by the US military. It acts as a fully automatic rate of fire until the third round after which the mechanism will not fire until the triger is pulled again. It is comonly misconcieved that one pull of the trigger always fires tree rounds, 1,2, or 3 rounds may be fired.

I switched my weapon to 3 round burst

3 round burst by Edwin R August 16, 2006

30 round dick

An extended magazine that sticks out of gun resembling a dick

Little homie had the pipe with the 30 round dick on that bihh here

30 round dick by MulaZayNewMex April 17, 2019

.30-06 rounds 

the meaning of 30-60 rounds is if how many bullets have been loaded into a magazine of a gun.
the 30-60 round refers to the bullets that your magazine can only hold.

.30-06 rounds for example if you have a colt 45 and the magazine of your gun can only hold 7 bullets so, it can shoot for 7 rounds. so it refers to the number of the bullets you have loaded to your magazine.

.30-06 rounds by nhuj February 1, 2017