I've gotten into the Run N Gun biathlon events over the last year or so and have decided I want to build a RECCE style AR for these types of events. For those that don't know, it's basically a 5K or 10K spartan race type run combined with 4-6 shooting stages spread out over the distance. Tactical 2-gun with target engagements from 25-600 yards sometimes. The first few I've done with my SBR, but I've determined I need a little more accuracy at distance, so the RECCE is my solution. I've narrowed it down to 4 options. Let me know thoughts, pros, cons, etc.
1) BCM RECCE 16" mid length Enhanced lightweight complete upper
2) Triarc Systems complete upper with 16" Track 2.0 barrel
3) Home build with Faxon 16" mid length pencil barrel
4) Home build with Ballistic Advantage 16" mid length BA Hanson profile barrel