Isn't 110 long action? Why is mine chambered in 308?

[Maztech89]

No the accutrigger bases are different. You will see listings for round back or flat back. It is exactly as the name implies, the top rear of the action is either round or... you guessed it, flat as in what you have.

Here's a link for one option. Sometimes cheaper to buy through optics planet or the like, sometimes not. I have been very pleased with all EGW parts from my several one piece bases to my 1911 parts.
http://www.egwguns.com/scope-mounts/...-mount-20-moa/

[Highfructosecornsyrp]

Thanks so much-I was actually considering a 30 or 40 moa base. Your link is exactly what I needed.