This review covers the O-Sight K, an RMSC footprint red dot sight with a 6 MOA dot, ideal for compact and subcompact pistols. The video demonstrates its installation, zeroing process on a Shield Plus in 30 Super Carry, and performance on steel targets. Key features highlighted include a side battery tray, shake-awake functionality, and built-in co-witness sights, with positive remarks on its daytime brightness and crisp dot clarity, even for those with astigmatism.
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