Originally posted by: dtyn
Originally posted by: Mookow
In regards to the XM8, they are going to have to do something about the carbine half. 5.56 NATO bullets coming out of a 10.5" barrel just arent going fast enough to fragment after impact, and lets face it, thats all a 223 has over a 22, velocity, and the effects of added velocity have on terminal ballistics. With current loads, 14" seems to be the minumum to get acceptable performance out of the 5.56 (using military loads).
The XM8 Combat has a 12.5" barrel, the XM8 SAW has a 20.0" barrel as does the XM8 Sharpshooter. ARL has already dtermined that the 12.5" barrel will deliver better accuracy and lethatlity than the M16 up to 300 meters. Pack it with the 6mm SPC, and you almost double the effectiveness of the XM8.
Well, last time I had looked at it (a while ago), they were still going to use the 10.5" barrel.