NcSTAR Large Tube 1x 30mm Illuminated Red Dot Sight

A: YES, will fit Ruger predator 223 rifle with a factory-installed Picatinny rail and DOES NOT need scope rings to fits. However, NCstar scope is not of good quality and has a hard time holding zero. I recommend you look at the Primary arms website and purchase their optics for a little more. I hope this helps!

A: Troy, this will mount right up to the Ruger Predator 223 rifle with a factory installed picatinny rail. I would also not rule out a higher quality optic such as the FireField : https://www.budsgunshop.com/product_info.php/products_id/101542/firefield+ff26028+impulse+compact+red+dot+sight+1x+22mm+obj+illuminated+circle+dot+red%2fgreen+black+matte+cr2032+%281%29

A: Yes this will fit any Piccitany rail or weaver rail, with no need to purchase additional rings or mounts, I've seen where some people put a riser on this for use with an AR15, to achieve a co-witness with their iron sights and to have a more heads up position when looking through their scope, but that's all a matter of personal preference and is not required