I currently have an PSA 14.7 CHF AR with and MLOK Rail and an FN barrel and I’m looking to do some upgrading. Thinking about putting on a Larue quad rail and replace the gas system and add a new BCG. Seen a a Iraqveteran88 vid. Did a melt down on it. Been looking to replace whole upper with a BCM but they are out of stock of the ones I like. Kinda going for a SOPMOD/MK18 look to it. Any help would be greatly appreciated.