Ya lazy assholes.
https://m.ebay.com/itm/L1R1-PUBG-Shooter-Controller-Smartphone-Mobile-Gaming-Trigger-Fire-Button-Handle/173257982595?_mwBanner=1
https://www.amazon.com/Controller-FengNiao-Sensitive-Survival-Android-iOS/dp/B07BMQX71M/ref=sr_1_1?ie=UTF8&qid=1523233416&sr=8-1&keywords=l1r1+mobile+trigger