On this rifle, paired with a picatinny rail, the Pro-Series 30mm Lows, PN# PR30-L, would be a great fit.
On a BAR, running an EGW 1-piece picatinny rail, you should have adequate fitment using our Pro-Series 30mm medium-height rings, PN# PR30-M!
The Vortex Viper HS LR 4-16x50mm Rifle Scope could be mounted on a 12 gauge slug gun.
Yes. The Vortex Viper HS LR 4-16x50mm Rifle Scope features a Dead-Hold BDC reticle that is good for hunting/shooting at varying ranges where estimating holdover is a concern.
The Vortex Viper HS LR 4-16x50mm Rifle Scope features an illuminated reticle that can be adjusted for brightness or turned off completely. Since this scope has an etched reticle, you do not always need to have your illuminated reticle turned on.
Per the manufacturer: The elevation is graduated in 1/2 MOA while the windage is graduated in 1/4 MOA. The scope provides a max elevation adjustment of 75 MOA and max windage of 50 MOA.
This is a second focal plane.
This scope does not require a battery as the reticle is non-illuminated.
Vortex makes really good rings: VX-RR-VRPRR30-PR30-H or these: VX-RR-PRCN-PMR-30-126