Just finished off the new build, actually, this was just a complete new upper for a previous pistol build. It's a Anderson pistol lower with a SB PDW brace and a CMC single stage, flat 3.5lb trigger. For the upper, I started out with a AR Stoner receivern and parts kit, and an ARP 12.5" 3R 1 in 11 twist barrel. The adjustable gas block, and hand guard are both from Mentium USA. Magpull AFG, Sightmark light/laser combo and AAC 51T muzzle device for the SDN6 can. The optic is something new to me, I was looking at either a Burris RT6, or a Vortex Strike Eagle and I ran across these guys at RITON. Did some research and read a bunch of reviews and pulled the trigger as it were. This particular model is X3 TACTIX 1x8x24. So far so good but I need to stretch it out this weekend. That is topped off with the Burris Fast-fire III in the PEPR mount. Looks like I'll be having a SkullTac to sell here soon. Anyway thats the rig. After tuning the gas block, it ejects right out at 4 o'clock consistently and runs very smooth. I got the Fastfire zeroed in at 27 yards, and the primary optic is set for 1.5" low at 27 yards, that should get me close when I zero it in at 100 this weekend.Bambi needs to be afraid, very afraid. Once I get it dialed in I'll post a range report and a solid opinion on the optic.