before I ventured into a new slide and later actual slide milling for a red dot mounted on a pistol, I used one of these DPP Titanium Corp dovetail adapter plates for one of my Glock pistols... the adapter is 7075-T6 and very tough... an inexpensive trial to help you make your decision...

https://www.amazon.com/DPP-Titanium-Mounting-Fastfire-anodizing/dp/B07SPT21CC/ref=sr_1_4_sspa?crid=27ZNMTKAILGYZ&dchild=1&keywords=dpp+titanium+mounting+kit+glock&qid=1623852875&sprefix=dpp+titanium%2Caps%2C192&sr=8-4-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyQTlZQVRMVVZCQzZRJmVuY3J5cHRlZElkPUEwNjk0NTg2VEc2T1VFR1pMNFdUJmVuY3J5cHRlZEFkSWQ9QTA1MTA3MjdBR1RPUzdWRVFERTUmd2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl