What an 11.5" BCM upper does to a blank firing adapter
I was recently involved in an LE training exercise as OPFOR and I used my 11.5" BCM with a blank firing adapter which shot about 150 rounds. After around 120 or so rounds the birdcage began to loosen and I did not notice until it stopped cycling due to the blank firing muzzle device/adapter deforming. I am assuming it is because the 11.5" has more pressure than a standard 16" upper which caused the issue. Thank fully the threads on the barrel did not get messed up.
Figured I would post up and share my experience for those who may have the opportunity in the future to use a blank firing adapter.
http://i.imgur.com/uSarUV3.jpg
http://i.imgur.com/2Ql6BVr.jpg
http://i.imgur.com/urrjmfi.jpg
http://i.imgur.com/8hP3tJj.jpg
Needs a good cleaning:
http://i.imgur.com/n1VqcCK.jpg