The NCStar AR-15 45 Degree Offset Flip-Up Rear Sight (part no. MAR45FLR) is a black backup iron sight built to pair with the matching offset front sight for AR-15 shooters running a magnified optic. It mounts to any receiver-height Weaver or Picatinny MIL-STD 1913 rail at a 45-degree angle so it’s ready the instant you cant the rifle off the primary optic. The A2-style dual-aperture design offers both a large and small aperture, and windage is fully adjustable with a large windage knob. The sight folds back flat for a lower profile and clears the majority of scopes on the market.

Key Specifications

• Mounts at a 45-degree offset to pair with an offset front sight.
• Features a dual aperture design with both large and small apertures.
• Windage is fully adjustable via a large windage knob.
• Folds back flat for a lower profile when not in use.
• Designed to clear most scopes mounted on the same rail.
• Ships at approximately 2.6 oz, adding minimal weight to the rail.

Frequently Asked Questions

Will this rear sight clear my scope? It’s designed to fold back flat and clear the majority of scopes on the market.

Can I adjust windage on this sight? Yes, it has a large windage knob for full windage adjustment.

Does it have one aperture or two? It’s a dual-aperture design with both a large and a small aperture option.

Buy the NcStar AR-15 45-Degree Offset Flip-Up Rear Sight

Order the Offset Flip-Up Rear Sight from our Lubbock, Texas gun shop for fast, insured shipping. See more AR-15 accessories and parts for your build.