LPVO with FSB

[sroc112]

I currently run a 2-10 LPVO on one of my ARs, sits on a 16 inch barrel, carbine length gas block, with a front sight post. Does not cause me any issues for what I use it for. At very low magnification, of course I pick up the FSP, but at my range I don't usually go below 4x on that gun.

Thinking of moving that upper/barrel over to a rifle that would use a red dot, and putting a mid length onto the one used with the LPVO, which would also have a front sight post.

My question is: would the difference in length of where the FSP is located on the midlength cause more or less disturbance using an LPVO? Carbine it being a bit closer to the optic, midlength being a little further away. Would the midlength cause the post to get picked up easier or other way around?

 

[kl3309]

Further away = easier to see, will be more in-focus
Mid-length over carbine isn't much of a difference, though, so may not be any more noticeable than it is now.

 

[308pirate]

I currently run a 2-10 LPVO on one of my ARs, sits on a 16 inch barrel, carbine length gas block, with a front sight post. Does not cause me any issues for what I use it for. At very low magnification, of course I pick up the FSP, but at my range I don't usually go below 4x on that gun.

Thinking of moving that upper/barrel over to a rifle that would use a red dot, and putting a mid length onto the one used with the LPVO, which would also have a front sight post.

My question is: would the difference in length of where the FSP is located on the midlength cause more or less disturbance using an LPVO? Carbine it being a bit closer to the optic, midlength being a little further away. Would the midlength cause the post to get picked up easier or other way around?

I've used true LPVOs (those with 1x mag) with a carbine that had the GI FSB. The FSB was a very faint blur at 1X and invisible at 4x. I can't remember exactly at what magnification it started to disappear but I want to say around 2.5X.

It was never an issue at any magnification because any time I was at a mag where the FSB was "visible" I had hard target focus.

I seriously doubt moving the FSB an inch or two farther from the objective lens would change anything. Even less so with an optic that isn't an LPVO like yours.

 

[sroc112]

Thank you

 

[dms416]

Further away = easier to see, will be more in-focus
Mid-length over carbine isn't much of a difference, though, so may not be any more noticeable than it is now.

Not apples to apples, but given it's a what...1.5-2" difference, I noticed a difference in going from 11.5-12.5" rails and having things mounted on top (switches, folding BUIS's) and then going to 13.5/13.75" rails and having more things creeping into FOV at lower powers even though the height of the optic and components remain the same height. Doesn't make a ton of difference in the grand scheme, but I can understand why it's bothersome.