I'm fairly certain getting the Grayops mag is the way to go. By the time you buy a regular AW mag and if (big if) you can find a HRD kit, you're going to be close price wise. And to do a 14 round conversion you're at 175 (mag 90/ extension 40/ HRD kit msrp 45) plus whatever you get charged for labor on the conversion.I am considering a CDG with a XYLO chassis. I have a Bartlein barrel on the way. I plan to have it chambered for 6bra. Probably TT Special.
And last time I tried HRD's website, I got a 404 message.