Drill attaching holes for scope bases. Please let us know what bases you will use. Typical configurations:
- Unertl: 7.2" between rear base (.860" spacing) and front base (.562" spacing), used by most external adjustment scopes including Lyman, DZ Arms and MVA Winchester "B" series
- Weaver 63B: 3" spacing between rear two holes (.860" spacing) and front hole
- 5-Hole: combination of Unertl and Weaver
- MVA 23" scope: 12" between rear base (.860" spacing) and front base (.562" spacing)
- MVA 28" scope: 17" between rear base (.860" spacing) and front base (.562" spacing)
