No more so than any other primarily printed build. Kaewon has also iterated on the bolt over time, adding things like the SCS bolt face and breach face and extractor.

Generally speaking on a build like this, you need to make sure the extractor moves freely, make sure there are no edges of the bolt face that will catch on the upper, file the feed ramp>liner smooth, and i usually knock off any sharp edge in the 12 oclock position that might catc…

u/PrintYour2A · 2021-01-24 22:13:38 UTC · score 1

Plunger is the round button on the under side of the slide. The tab on the trigger bar engages that button. Check those for sharp edges/burrs. Does it feel like anything is dragging/making contact?

u/Sharp-Accident-2061 · 2021-04-03 02:25:41 UTC · score 8

Curious why you went with a shape like this ? Was the frame not able to resist the stress from firing with the magazine in the grip and removed parts for the trigger group. Are you using Fea or something?