My FPC magazine release main housing broke in half after about 500 rounds. I contacted S&W customer service and they said that they would send me the three parts that make up the magazine release assembly.
10 days later (today) a package came from S&W with 2 small magazine release parts (the spring and the plunger).
The main part (the broken main housing shown in the picture) did not arrive.
I sent S&W an e-mail informing them of my missing repair part. I hope that I hear from them soon. My carbine is a single shot until then.

This long-winded description leaves me with two questions:

Has anyone else had a FPC magazine release break?

Has anyone had repair parts sent from S&W arrive in two different packages?

Is the magazine release body metal or plastic?

The main body of the magazine release is metal but it looks like pot metal where the piece broke off. I tried to put it back together with JB Weld but it didn't work.

I wonder how long before we see aftermarket machined stainless nitrided ones at $65 bucks a pop?

S&W sent me the replacement Mag Catch today and my FPC is now working fine.

As far as I'm concerned, S&W Customer Service is still the Gold Standard.

I have about 500 rounds through my FPC carbine. No problems (or what the ladies call "issues") so far.

I have been sent parts in two different mailings.