I'm digging the build.
I love the people who will upgrade a gun they prefer over just buying some ridiculous soulless ego or gun of the like.
Props to the build.
Fail on the barrel. Stiffis are more hype than performance/quality.
See if you can ditch that and use some of the money returned to score an appropriately sized Lurker Eigenbarrel.
It will also better match the milling and scheme of the gun