The version of the product as advertised may well differ from the product as sold to a bulk buying customer with enough purchasing clout to specify his own deviations from the published spec. It would be incautious of me to assume the civilian Tac-50 is the same as the issued C15 and C15A1 in the absence of positive supporting data - and as this isn't a contentious point or one that someone's trying to hide, I don't feel the need to go out on a limb. For what it's worth, the C15A1 definitely does differ in that the stock is not the McMillan own brand fibreglass product, not that that makes a significant difference to its shooting consistency for our purposes here.
I wouldn't assume that, say, British Airways' DC runs identical kit to what is presented in the manufacturer's catalogue just because the list spec for their boxen includes xyz TB of storage.
Biting the hand that feeds IT
