If this is in the wrong forum please move.

The only difference that I know of is that the M4 has a collapsible stock.  What, if any, are more differences between the AR and the M4?

In short, a Colt roll mark and a happy switch. The AR is the semi-automatic, civilian counterpart of the military M16/M4 family of rifles. It has become a very broad designation and covers anything civilian from a 24" barreled tack driver to a 7.5" barreled kitty cat.

ARs are available with all of the M4's features--collapsable stock, extend feed ramps, M203 cutout, 14.5" barrel, oval handguards--accept the full auto FCG and "M4" stamped on the side. So to properly answer your question, you want to know the differences between the M4 and which AR?

Quoted: In short, a Colt roll mark and a happy switch. The AR is the semi-automatic, civilian counterpart of the military M16/M4 family of rifles. It has become a very broad designation and covers anything civilian from a 24" barreled tack driver to a 7.5" barreled kitty cat. ARs are available with all of the M4's features--collapsable stock, extend feed ramps, M203 cutout, 14.5" barrel, oval handguards--accept the full auto FCG and "M4" stamped on the side. So to properly answer your question, you want to know the differences between the M4 and which AR?

What is a happy switch? And I mean the AR15.

An AR15 is a 20," generally semiautomatic, rifle.
An M-4 is a fully automatic military carbine. It has a collapsible stock and a barrel that is machined to allow the attachment of a grenade launcher.

Quoted: An AR15 is a 20," generally semiautomatic, rifle. An M-4 is a fully automatic military carbine. It has a collapsible stock and a barrel that is machined to allow the attachment of a grenade launcher.

Thanks.  

You have got to be fucking kidding me?

When is this shit gonna end?

Read more.
Post less.

Quoted: Quoted: In short, a Colt roll mark and a happy switch. The AR is the semi-automatic, civilian counterpart of the military M16/M4 family of rifles. It has become a very broad designation and covers anything civilian from a 24" barreled tack driver to a 7.5" barreled kitty cat. ARs are available with all of the M4's features--collapsable stock, extend feed ramps, M203 cutout, 14.5" barrel, oval handguards--accept the full auto FCG and "M4" stamped on the side. So to properly answer your question, you want to know the differences between the M4 and which AR? What is a happy switch? And I mean the AR15.

Happy switch=select fire (burst or full auto). The M4 has three-round burst, while the M4A1 has full auto. Like I said, AR15 is a very broad designation. Read here.

Quoted: You have got to be fucking kidding me? When is this shit gonna end?

Seriously, you've been here over a year and have almost 10k posts, but you don't know what makes an M4 an M4 and what an AR15 is?
Spend some time reading the AR forums and don't spend so much time in GD...