The Sig Sauer is world-famous for its high-quality firearms, but now you'll install one among their optics to your firearm also. The Romeo Zero is a substantial red dot sight ideal for setting up on pistols or pistol caliber carbines. This small but powerful optic is right for your quick acquisition shooting needs. Even if you're trying to find something for the intrinsical conservancy, duty, or competition, the Romeo Zero is that the ideal Micro Red Dot Sight. This is often an honest product and that I recommend it. The dimensions are extremely concealable and you'll adjust brightness. The cons are that you simply need to remove the unit and re-zero to vary the battery.