[Zack The Ripper]

In all honesty with my experience with a few different WE platforms, it's best to use them with mostly WE OEM internals. Aside from an NPAS, new inner barrel, and new hop rubber you really don't need to change anything.

Best is to buy a ton of spare WE parts for a fraction of the price of the RA-tech shit - and I do mean shit - and replace failures as needed. WE has come further in their newest generation stuff with regards to part quality, and everything WE works well with everything WE. The moment you add one part that isn't WE and isn't 100% spec with WE shizzle, you run into alignment issues which morph into performance issues.

I even switched everything in one of my M4's to full RA Tech stuff and I still had to make a ton of adjustments and modifications to said RA Tech parts to make the bitch gameable, but bolt lock never worked - huge waste of money. In the end I switched all back to WE bits and it worked fantastically, 100% functionality. Sold it, bought a WE SCAR, left it stock internally except NPAS, inner barrel, and hop rubber; zero issues from day one to the day I sold it, no failures, and I gamed the hell out of that thing.