This Gunblast.com video features Boge Quinn testing the COS-21, a 2011-style double-stack 9mm pistol from Cosaint Arms. The review highlights the pistol's features suitable for competitive or defensive shooting, emphasizing the meaning of "Cosaint" (Defend/Protect). The description also lists several brands for holsters, optics, ammunition, and accessories that may be featured or referenced in the video, including Simply Rugged Holsters, C&H Precision Weapons, Trijicon, MBX Magazines, Buffalo Bore Ammunition, Double Tap Ammunition, Federal Premium Ammunition, and Lyman Products.
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