Originally Posted by L473ncy
For the primary you're probably good with a SystemA PTW. The cylinder swapping makes it super easy to change speeds and it's less than 30 seconds to swap out. BUT they're pricey, expect $1800 for a PTW at minimum more if it includes real steel accessories (it's built to exact real steel specs).
could buy the WE with 2 uppers for less than the PTW