Working on my SPR idea I want to mount a reflex type sight like the burris fastfire on my rifle.  Whats the best way to do this?  I'm leaning towards using a 45 degree rail somewhere (not sure the best position for it).  I have the ability to mount it on top of my scope rings, or to buy another mount somehow.   Does anyone utilize this in a better way?

 

I will have a 15" vtac handguard and a nikon scope in a pepr mount like this:

How much does that weight?

 

Anyway, if you really want one, I'd say at 45 degrees between scope and rear sight. No point in adding more weight any further forward. 

How much does that weight?

 

Anyway, if you really want one, I'd say at 45 degrees between scope and rear sight. No point in adding more weight any further forward.

.9 oz for the fastfire and 1.45 oz for a gg&g rail. Or do you men the set up in general?

 

 

I have a Weaver offset rail adapter - $15 available if you need one.

 

If I had that to work with I would move the scope back so that the rear of the scope is towards the end of the receiver. Why is it so far forward? Eye relief issues? Once moved back, I would place the 45 degree adapter immediately in front of the scope mount so the RDS is towards the middle of the upper.

I have a Weaver offset rail adapter - $15 available if you need one.

 

If I had that to work with I would move the scope back so that the rear of the scope is towards the end of the receiver. Why is it so far forward? Eye relief issues? Once moved back, I would place the 45 degree adapter immediately in front of the scope mount so the RDS is towards the middle of the upper.

That's not the upper its going on. I'm still gathering parts to assemble the upper. But yes eye relief was better pushed up.

 

If you shoot from improvised positions eye relief becomes an issue so you end up with the scope moved forward for pretty much anything not bench shooting, in my experience anyway.

 

Yeah I meant the weight of the whole rifle, the balance looks front heavy, but a different upper would be different so I withdraw my question, by usually I say have your center of gravity somewhere over the center of the upper receiver so in a layout with a heavy scope, I'd put the red dot somewhere towards the back to balance it out as much as possible

If you shoot from improvised positions eye relief becomes an issue so you end up with the scope moved forward for pretty much anything not bench shooting, in my experience anyway.

 

Yeah I meant the weight of the whole rifle, the balance looks front heavy, but a different upper would be different so I withdraw my question, by usually I say have your center of gravity somewhere over the center of the upper receiver so in a layout with a heavy scope, I'd put the red dot somewhere towards the back to balance it out as much as possible

 

Understood. Basic info on the upper will be 18" spr barrel with 15" troy vtac hg, and the lower that's in that picture with that scope. Don't think any bius. The bipod, a vfg (or handstop) and light will likely be mounted.