SUBSIM Radio Room Forums - View Single Post - The Firearm thread: Engineering artistry of wood, polymer and steel.

August · 07-25-13, 11:53 PM

Interesting tidbit of firearms related information I found out today.

Although Colt AR-15's are marked as a .223 on the lower receiver all their barrels are actually chambered for 5.56mm. This means I don't have to do anything to shoot both ammo sizes. Yay!

This only applies to Colt manufactured AR's BTW. Other makes YMMV.

07-25-13, 11:53 PM	#64
August Wayfaring Stranger Join Date: Apr 2005 Location: Massachusetts Posts: 22,667 Downloads: 0 Uploads: 0	Interesting tidbit of firearms related information I found out today. Although Colt AR-15's are marked as a .223 on the lower receiver all their barrels are actually chambered for 5.56mm. This means I don't have to do anything to shoot both ammo sizes. Yay! This only applies to Colt manufactured AR's BTW. Other makes YMMV. __________________ Flanked by life and the funeral pyre. Putting on a show for you to see.