[FirestormX]

I'm pretty sure RA-Tech doesn't make internals for WE pistols.
They make them for WE GBBRs, but I'm pretty sure RA-Tech only make WE G17 slides and hop up rubbers (and maybe recoil springs?)

I know you run a WE SCAR (as do I), so I should also point out that WE GBBRs are much better quality than their GBBPs. They even brand them as WETTI - I like to think that they do this so that their GBBRs don't get lumped in with "WE" GBBPs.

If you take out the WE internals from a G17, and replace them with TM or something, then sure. But why not buy a TM in the first place? It's a bit more money (even if it is expensive to order parts separately, and "build" it up), but you don't have to worry about WE tolerance problems, where the housing might not fit, even though the WE is supposed to be TM compatible.

It's kind of like a car. You could get an old crappy Kia and swap in a Honda engine. The Honda engine will last longer and probably perform better. But you'd still be sitting in a Kia, and you'll have put all that money and time into buying the engine parts and trying to patch it into your Kia.

Why not spend a little more money, and get something that you know has proper fit-and-finish, that is going to be reliable, and that you know won't fall apart again in another few hundred rounds?

It's especially important on a secondary weapon (even though OP is using it as his primary). Generally, if you have to swap from your primary to your secondary, it's in an emergency. Your primary has malfunctioned, or you've run out of ammo and don't have time to reload. You transition to your pistol as quickly as you can, get it on target, and get back in the fight. But if your secondary is unreliable, and it is your emergency life line that will save your life, then you may as well not even be carrying it.

People kind of think of the secondary as "it's just my secondary - I'll hardly ever use it. I can just cheap out on it". But they don't realize that the reason you have the secondary, is because it's going to save your life when your primary is unable to.
It's like a backup parachute. If you aren't aspiring to obtain the Darwin award, then you will never say "well, my main parachute should open most of the time. I don't really need to check my backup parachute. I probably won't need it".

People tend to look at those who say "that's a crappy gun. Just throw it away and buy something good, instead of fixing it" as elitists or trolls. But sometimes (depending on who says it), it's because they've wasted a lot of money in the past, or they know how poorly the gun will perform, and so on. In this case, I know WEs rarely run very long or very well. No sense throwing more money at it, just to get the same sub-par performance, when you'll just have to do it again when it breaks.

Spend a bit more, and get something that has quality, reliability, and holds its value. You'll save money in the long run, get more money back when you grow tired of it, and have maximum enjoyability while you do have it. If I run one of my shittier pistols, that I know won't perform well, it always makes me uncomfortable when I draw it. I don't know if the next trigger pull will actually fire. I don't know if it will hit the target. I don't know if it will do what I need it to do, and it's a very unpleasant feeling.