Latest Mobile Silk 65 user agents:

User Agent Platform Device
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.2.3 like Chrome/65.0.3325.144 Safari/537.36 GNU/Linux Unknown
Mozilla/5.0 (Linux; Android 5.1.1; KFTBWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.5.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 10
Mozilla/5.0 (Linux; Android 5.1.1; KFTBWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.2.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 10
Mozilla/5.0 (Linux; Android 5.1.1; KFSUWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.5.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 10 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFSUWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.2.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 10 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFMEWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.2.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 8 (2015)
Mozilla/5.0 (Linux; Android 5.1.1; KFGIWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.5.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 8 (2016)
Mozilla/5.0 (Linux; Android 5.1.1; KFGIWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.4.2 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 8 (2016)
Mozilla/5.0 (Linux; Android 5.1.1; KFGIWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.1.66 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 8 (2016)
Mozilla/5.0 (Linux; Android 5.1.1; KFFOWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.5.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire 7"
Mozilla/5.0 (Linux; Android 5.1.1; KFFOWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.4.2 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire 7"
Mozilla/5.0 (Linux; Android 5.1.1; KFFOWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.1.66 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire 7"
Mozilla/5.0 (Linux; Android 5.1.1; KFDOWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.5.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 8 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFDOWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.4.2 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 8 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFDOWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.2.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 8 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFDOWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.1.66 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 8 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFAUWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.5.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 7 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFAUWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.2.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 7 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFASWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.5.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 7
Mozilla/5.0 (Linux; Android 5.1.1; KFASWI Build/LVY48F) AppleWebKit/537.36 (KHTML, like Gecko) Silk/65.2.3 like Chrome/65.0.3325.144 Safari/537.36 Fire OS 5 Fire HD 7