I recently got my Fulton M39 DMR (M14/21 in a SAGE Mod 0 chassis, FA fixed rcver scope mount). FA built the gun for me with NM Op rod spring guide, NM trigger job, and Criterion chrome lined barrel. I put a NF 3.5X15x55 scope with NF Ultra Light rings on it. I'm relatively new to the M14 game. The last time I shot a M14 was 20 plus years ago when I was a young pup on the USS Benjamin Franklin. Anyway, the gun shot amazingly well! Sub MOA at 100 yards for me. My brother (an experienced shooter) was shooting close to half inch groups. We were using various match grade ammo to find what it likes best (Hornady 168 gr, Black Hills 168 gr, and Federal Gold Medal 168 gr). It all shot well but the Hornady and Black Hills shot slightly better than the Federal in my gun. I can't say enough good things about this gun/scope combo! Thanks to Clint and his crew at Fulton for building me an amazing gun. Thanks to Chirs at Sport Optics for counseling me and guiding me towards the NF scope and rings. All of it was on the expensive side, but you do get what you pay for!