You are cherry picking. but I will answer: AR15

AR-15 (disambiguation)

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AR-15 most commonly refers to AR-15 style rifle designs made by various manufacturers after the patent on the Colt AR-15 expired in 1977. It may also refer to:

Rifles[edit]

• Colt AR-15, a semi-automatic rifle manufactured and trademarked by Colt's Manufacturing Company, based on the original ArmaLite AR-15 design
• ArmaLite AR-15, a selective fire rifle designed by ArmaLite and a predecessor to the United States M16 rifle
• CAR-15, a line of compact, short barrel, selective-fire carbines manufactured by Colt
• List of Colt AR-15 & M16 rifle variants, for Colt-made firearms based on the original ArmaLite AR-15 design

所有跟帖： 

• 这个定义要由ATF定义，实际上没有任何军队装备AR，半自动AR完全就是民用运动步枪 -二刀流- ♂ (169 bytes) () 03/21/2019 postreply 13:55:11