Awesome, glad it was a relatively simple mod! This chassis seems like the perfect suppressed FRT platform. Gonna be keeping an eye out for a full-size now.

Sounds good, .38spl is very pleasant to shoot and cheaper anyway haha.

I'd be interested in the reinforcement ideas. The hammer looks like it could be cast out of a metal like Zamak. The breech might be too complex but I bet there is a way to cast it too, maybe in parts, then cleaned up using jigs like 80% frames/lowers. SCS inserts for contact surfaces could be an option too.

If you can recrimp properly then it might work. Seems like a lot of work when a glued spacer may be simpler and more repeatable. Reloading like that can be sketchy if you're not familiar with the reloading process.

Love the build! Is there enough space behind the slide to accommodate weighted backplates for suppressed FRT use?

Take a Q-tip and see if the residue wipes away, it's likely just the powder residue from the blank. Case cracking probably comes from the chamber being slightly oversized for the blank. A note for the slugs, since the blanks are crimped at the tip and the air gun slug rests on it, the blank opens up and damages the bottom skirt of the slug when its fired because there is no space, which would mess with your accuracy. You might be able to increase accuracy of the slug by gluing a printed spacer or a BB between the slug and blank.

The Stack-A-Gat19 by SCSM would be a pretty good start. A mostly milled Harlot seems doable since the side plates are printed flat. Honestly, a lathe may be a better option since it opens up making barrels, launcher hulls, anything cylindrical etc.

Appreciate the update. I'm assuming that .357 mag isn't recommended if the hot .327 are causing trouble?

The man himself! Thank you for the info, I'll give the Torx a try and I'm glad the headspace is intentional. How are the other caliber Modelos coming along? I'm looking forward to building the .38 spl version after the 43R.

Glad there's interest in the P10! I compared a P10 mag to a Glock mag and the P10 mag is smaller front-back but just about the same widthwise, so the weakest and thinnest walls are there. You might be able to use a printed follower + Glock springs since the angle is very similar and the Glock mag walls are thicker so internal area is smaller. The feed taper where it goes from double to single stack for the mag is pretty long so not a lot of material there either. Worst case, you could do a single stack P10 mag with super thick side walls and maybe a G43 mag spring lol.