An Unholy amount of Muzzle (and handguard and ejection port) flash
This is someone else's vid of the Daniel Defense Muzzle Climb Mitigator on a 10.3 barrel of some sort.
https://www.youtube.com/watch?v=S2rwV1U6cHo
I have never seen anything like this before. The flash seems to engulf the handguard.
Some screenshots:
http://2.bp.blogspot.com/-8Aa2sYnUgl...4-06-41-40.jpg
http://2.bp.blogspot.com/-DPuTt-Mz0Y...4-06-42-43.jpg
http://1.bp.blogspot.com/-33aBzBw9Ki...4-06-44-04.jpg
Anyone out there experience anything similar?? I don't own anything 5.56 shorter than 12.5", nor do I use this DD muzzle device, but just putting this up there.