What if it was as simple as a small barrel obstruction? The target was hit with sand and the bullet tumbled from its path. Flash suppressors on M-16 very often loaded up with dirt. There would be a "Wack" report and funny smoke.
No there was no sand in or on the gun. It was taken out of its case and placed on the shooters stand. Two bullets were fired through it no problem, it was the third bullet that came apart. If it was sand, I would think the first two bullets would have blown anything out or off the flash suppresor. I thinks its just one of those thing that make you go hmmmm lol
And the gun can shot either .223 or the 5.56. Whats the difference between the two?
There are small differences between the two and it is usually not recommended that you shoot 5.56 in a gun chambered for .223. What you'll find is that morst people ignore this and manufacturers like Federal in their website mix the two and sell the ammo labeled as 5.56/.223.