This barrel has not been tested to fit in an RPX9. It is designed to match Glock factory dimensions so is compatible with Glock factory slides or Aftermarket slides that are designed to be Glock compatible.
Yes, the EXOS-513 will fit a Gen 3 Glock 19 with this barrel installed.
Yes, the Glock 19 pattern barrel will fit a Glock 19X
Yes, these barrels will fit Gen 1 through Gen 4 pistols for the Glock 17 and Glock 34 barrels and will fit Gen 1 through Gen 5 pistols for the Glock 19 barrel.
No, the chameleon PVD has random coloration so each barrel has a unique color pattern.
The Glock 19 barrel should be approximately the correct length for the Dagger. We have not tested with a Dagger pistol so exact fitment is not guaranteed.
No, that barrel would only work in Gens 1 - 4 models.
The G17 models listed will work with Gens 1 - 4.
No, these barrels are for Glock pistols and will not fit M&P pattern pistols. Here are the barrels for Full-Size (4.25" barrel) M&P pistols: https://www.opticsplanet.com/faxon-firearms-smith-wesson-m-p-fullsize-flame-fluted-threaded-9mm-barrel.html
The Faxon Glock 34 Barrels are compatible with generations 1-4.