Marble Arms Rifle Fixed Peep Bullseye Rear Sight Black

The Marble Arms Rifle Fixed Peep Bullseye Rear Sight is a steel, barrel-mounted peep sight designed for shooters who want straightforward, reliable aiming without electronics or batteries. Built around a distinctive double-ring design, this fixed rear sight mounts to standard 3/8" dovetail slots found on many rifles and works best paired with traditional bead-type or blade front sights. It's a no-nonsense choice for hunters, target shooters, and anyone looking to improve consistency through classic sight alignment fundamentals.

The bullseye-style peep delivers an optical centering benefit: misalignment becomes immediately obvious. The moment your rear sight drifts out of perfect alignment with the front sight, the relationship between the two rings breaks down, signaling you to correct your form before the shot breaks. This built-in feedback loop trains better shooting discipline and helps tighten groups through improved repeatability. Unlike tube or aperture designs, the double-ring peep gives you a clear view of the target while keeping alignment faults visible.

Steel construction means this sight handles field use without flinching. It's fixed—no adjustment turrets or moving parts to get knocked out of zero—and that simplicity is a feature, not a limitation. Whether you're sighting in for a season or running drills at the range, a fixed peep sight that doesn't move is one less variable to worry about. This is the kind of sight that rewards disciplined shooting and pairs well with rifles that already have solid mechanical integrity.

Key Features

• Double-ring peep design for clear sight alignment feedback
• Steel construction for durability in field and range use
• Barrel-mounted dovetail attachment (fits standard 3/8" slots)
• Works with traditional bead or blade front sights
• Fixed sight—no adjustment mechanisms to fail or drift

Specifications

Frequently Asked Questions

Will this rear sight fit my rifle?

The Marble Arms Fixed Peep Bullseye mounts to standard 3/8" dovetail slots found on many rifles. Check your rifle's receiver or barrel for a dovetail slot matching that dimension. If you're unsure, measure the slot or consult your rifle's manual.

What front sight should I pair with this rear sight?

This peep sight works with traditional bead-type or blade front sights. The alignment depends on having a simple, defined front post that centers clearly within the rear peep rings.

Is this sight adjustable?

No, this is a fixed rear sight with no elevation or windage adjustments. Your zero is set at the time of installation, and it does not move unless removed and remounted.

What's the main advantage of the double-ring peep design?

The double-ring setup provides visual feedback when alignment drifts. If your rear sight shifts or your shooting form breaks down, the front sight visibly leaves center in the rear rings, helping you correct before the shot.