I see that LWRC has a 12.7" upper for their M6A2 style rifles but they don't have this barrel length in their M6 IC line. I called them last week to inquire if I could get a 12.7" barrel on one of the IC uppers (since they offer a 10.5" barreled upper and a complete AR pistol with this barrel length) and I was told they don't offer any uppers or rifles/pistols with this barrel length. Does anyone have any info as to why this isn't an offering?