Meprolight MPO-S | 3/33 MOA Bullseye | RMSc | 901141171

The Meprolight MPO-S is a compact open-emitter red dot sight designed for pistol applications that require a low-profile footprint and fast sight acquisition. It offers a selectable three-segment reticle — a 3 MOA dot plus a 33 MOA bullseye and 33 MOA ring — and is compatible with RMSc/Shield-style mounting patterns. The unit includes automatic brightness adjustment and a shake-awake feature to preserve battery life while remaining ready for use.

Common uses for the MPO-S include concealment-friendly carry mounts and precision or training work on the range where a fast, unobstructed sight picture is preferred.

Product Specifications

• The manufacturer is Meprolight.
• The manufacturer part number is 901141171.
• The model designation is MPO-S.
• The reticle is a selectable three-segment configuration: 3 MOA dot / 33 MOA bullseye / 33 MOA ring.
• The optic footprint is RMSc / SHIELD, allowing direct mount to compatible pistol plates.
• The magnification is 1x for an unobstructed sight picture.
• The eye relief is listed as Unlimited.
• The objective opening is 0.80″ x 0.60″.
• The power supply uses CR1632 lithium battery (one included).
• The unit provides 12 settings for brightness adjustment.
• The waterproof rating is IPX7.
• The listed weight is 0.80 oz.
• The click value for adjustments is 1 MOA.
• Night-vision compatibility is listed as Yes.
• The UPC for this product is 810013524475.

The MPO-S combines a small, snag‑resistant profile with multiple reticle options and a common RMSc footprint, making it a practical choice for pistols used in concealed-carry setups or for shooters who prefer a minimal, fast-acquisition sight for range practice. Durable features such as IPX7 waterproofing and a shake-awake circuit support reliable service life in routine use.