Sig Sauer ROMEO MSR, Gen II, Red Dot Sight, 1X20MM, 2 MOA Dot, Black, Includes See-Through Riser Mount SORMSR101 The ROMEO-MSR is a sealed compact red dot or green dot sight intended for MSR, carbine, shotgun and air rifle. Brightness is adjusted with a top-mounted rotary dial, featuring 10 daytime and 2 night vision settings for quick target engagement in any condition.