Can't reccomend Flexoptix[1] enough. Great service, fast shipping, and you only need to maintain one stock of optics even if you use kit from different vendors. FS.com are the go-to for bulk purchases of pre-coded optics on a budget: a few more cot deaths than most, but they're cheap and in my experience work reliably enough. [1] https://www.flexoptix.net/en/ ~a