Originally Posted by
tom12.7
Maybe, I should have asked what the design intent is for this platform?
Knowing that gassing a 11.5" mid gas barrel without a can with lower port pressure ammunition results in port size range for a given action mass and system. Then also knowing that a 11.5" mid gas barrel with a can that tends to be at the higher cyclic rate change is added with higher port pressure 5.56 ammunition with the same action mass and system, another range of preferable port sizes results. The possible overlap between the 2 types of operation is much smaller in range than what could be had by looking at the same preferable ranges when the gas system for each is reduced somewhat.
What I'm not catching here is how, in the current form of the platform can a 11.5" mid gas 5.56 operate in a wide span of function for suppressed or not without knowing the can (if used?) or the ammunition? When the gas system elongates with the reduced action pressure dwell time, the rapidly depressurizing barrel can work well dedicated to certain circumstances. Making that item for general use may lead to issues, as the end user may use ammunition and cans that do not fit well with their function overall.
I would tend to hesitate against going against a conventional carbine gas 11.5" 5.56 for most without a can. I could see the possible advantages of the carbine gas +1" in a 50/50 type suppressed gun, but mostly for suppressed only. I would be hard pressed to recommend the mid gas length in those without a can, but it has the ability to work very well with a dedicated suppressor.
Bookmarks