Well I guess we just both need to provide documentation/proof to back up our statements.
lol, my end is pretty damn well known throughout the shooting commuanity...
If you have data, that states otherwise, by all means post it up.
Some good reading on how the AR15 made its way into being the primary entry weapon on FBI HRT & SWAT teams.
Touches on the ballistics I'm posting about.
http://www.americanrifleman.org/mobile/article.php?id=24838
Special Agent Bob Taubert, then assigned to the unit responsible for training the FBI’s field SWAT teams, pushed for the change. When I talked with him recently, he gave full credit for the initial push to two Southwestern law officers, cousins Jack and Rick Furr. They, in turn, give credit to Clint Smith of Thunder Ranch fame, who was an early proponent of the AR as an entry weapon. Taubert finally convinced the Firearms Training Unit to test the ballistic performance of the .223 Rem. against the two SMG rounds then in use, the 9 mm Luger 147-gr. JHP and the 10 mm 180-gr. JHP.
Ballistic Research Facility personnel ran the rounds through the complete FBI protocol. When the smoke cleared, it was apparent that the .223 Rem. rounds penetrated less than the handgun cartridges. Except for the longer range of a missed round, the AR system was found to be a safer and more effective round to use in close-quarter combat.
The switch from submachine guns to the M16 and M4 was then rapid and complete. The MP5 in both calibers was replaced both in training and in the field. Today, new agents in training at Quantico use M4s with “iron” sights and modified to fire semi-automatic only. In the field, investigative agents use an M4 made by Rock River Arms with an adjustable-length stock, EOTech sight on a Dominator mount with a SureFire M73 light. The rifles are semi-automatic only. The field SWAT teams are using mostly Colt M4s capable of both semi- and full-automatic fire with PLR1 lights by Streamlight. A very few MP5s in either 9 mm or 10 mm are still out there but are seldom put into operation, and new agents in training at the FBI Academy, Quantico, are no longer trained on the system.