With enough time and money anything is possible, but, I wouldn't try it.
Scope mounts that mount on the left side of the receiver using the four screw holes are available from Weaver.
Mount for a scope.
You need a Weaver Side Mount #2 (which is the base). Weaver also make 1" side mount rings that mount onto this base. That's what I have on my .222 Savage 340.
weaver refers to the type of scope mounts the scope uses. a weaver scope can mount on any rail size.
A weaver number 2 base and your choice of weaver side mount rings, midway has both. Total cost for both pieces is around $50.
The are made by different companies.
The Savage springfield 840 is the later version of the Saveage 340. Midway USA has a #1 weaver mount for the 840. Under savage 340 they also offer a B-square mount with rings that has better reviews than the weaver mount.
Hello: Weaver offers a scope base for the Marlin Model 512 Slugmaster, contact Weaver for a complete package. Thanks side scope mount (Weaver 10M)
You mount it the same way you mount a scope. The rifle or gun must have an 11MM or Weaver mount on the barrel for the red dot to attach to.
Since it has weaver rails, all you need are Weaver scope rings. An offset mount will help too.
That will take a Weaver #12 base for both front and rear or a Weaver #2 sidemount. Weaver notes that the rifle will need to be drilled and tapped. See http://www.weaver-mounts.com/mountcharts/default.aspx
Most NCStar products are Weaver rail mounted, so you shouldn't have any problem pairing those two products up.