I am building a 12.5" 5.56 Pistol as a general purpose rifle on a LMT platform. Reliability and accuracy are the priority, I would like to save weight but I'm willing to sacrifice that a little. I know I need to have the barrel machine to fit the MRP-L upper. Mid vs carbine length due to dwell time, it will host a HUX FLOW 556k suppressor and have a VLTOR A5 buffer with the Geissele Super 42 spring and have the LMT enhanced BCG.
I have narrowed down the barrels to the following options and would like your opinion and possible pros and cons. Other barrel options are welcomed!
*Faxon Duty Series 12.5" Gunner, Mid-Length, 4150 QPQ Nitride 556
*Rosco K9 12.5? Sage Dynamics, Gunner Gas length (in between carbine and mid-length)
*Criterion Barrels AR-15 CORE SERIES 12.5", CARBINE GAS
*12.3" 5.56 Ballistic Advantage HANSON CARBINE LENGTH Preference Series