What you quoted is about 2011 failed trails so does the recent ones in both carbine and AR, Regardless its a carbine or a AR their mechanism & metallurgy are basically the same which is the prime factor for their failures, The link is provided for your understanding..
No, The 2011 trails were final and are done with a conform result, The issue here is to re-activate it for malicious intentions which involve bribery and scam, MK1C is not competing for carbine tender rather MSMC which cleared its trails and sitting ideal for a year or so ..
You first have to know how trails are conducted before getting to the bottom-line & Their are more than one chance given to contenders when they fail, The contender don`t get one or two rifles for trails rather 20-50 pieces for a single season of trails, A mechanism failure can be understood but a PNS falling every-time from mount make no sense to me, The story is cooked up..