Sig makes nice value red and green dot sights in ROMEO series. However, there is little information on which mount type these sights use - and this video should help to understand the options. Sig Sauer Romeo-MSR Green Dot used in the video as the example, as well as mounts from Romeo5. UTG and Aim Sports mounts shown in this test are in links below: Aim Sports Absolute Cowitness QD Mount: https://amzn.to/2PuaPuW UTG Super Slim 1/3 Cowitness Mount: https://amzn.to/2PsxhEz ADM T1 Low Mount - https://amzn.to/330vYa6 Check out my Amazon store https://www.amazon.com/shop/rubearusa