An improved version of our 50 cal MG has been created. Major improvements are that it no longer requires field adjustment for the head space and timing, and the muzzle break now reduces flash by 95%.
http://www.army.mil/article/92130/M2A1_Machine_Gun_features_greater_safety__heightened_lethality/
I'll take two!
My unit just fielded these. It's incredible to me ot took the better part of a century to improve the M2 so soldiers don't have to do headspace and timing.