Improve your accuracy whether it's day or night with the SIG SAUER Electro-Optics SOR1P100 Romeo1Pro Red Dot Sight. The molded glass aspheric lens with high-performance coatings delivers increased light transmission and reduced distortion, while the 3 MOA red dot includes multiple brightness settings for quick target engagement in most light conditions. The TruHold™ Lockless Zeroing System uses twin adjustment springs to withstand recoil and return to zero, and the IPX-7 waterproof and fog-proof design allows for use in most weather conditions.