This video from Rock Island Auction Co. showcases a pair of historic AR-platform rifles with unique attachments. The first is an M16A1 rifle fitted with an M203 40mm grenade launcher. The main attraction is a full-auto Colt AR-15 equipped with a rare Wilson Arms breaching shotgun slung beneath the handguard and barrel, reminiscent of combinations seen in video games. The description notes the Wilson Arms shotgun is a modified Remington 870, similar to the Knight's Armament Master Key, though its mounting system is less robust. The video highlights these as collector's items sold in strict accordance with the National Firearms Act, offering historical interest rather than practical modern application.
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