The New Hotness: Removable FCG's in Polymer Pistols

[Ex313]

I need help to clarify something.
If I buy a Springfield Echelon or one of the other pistols that uses the fire control group as the serialized part, I should be able to have both a long frame and a short frame pistol if I get the right parts correct?
One 4473 for two ?
Or am I missing something?

 

[erykv1]

Correct, you can have as many frames and slides as you want. The FCU is the only serialized component that is considered the "firearm"

 

[Ex313]

Correct, you can have as many frames and slides as you want. The FCU is the only serialized component that is considered the "firearm"

Thanks for confirming that.

 

[Jackie Graham]

Ok I am new to this concept so forgive my ignorance. So the FCU is serialized not the frame.
If you should buy an aftermarket trigger, is the firearm no unserialized?

 

[CTS Tactical]

I need help to clarify something.
If I buy a Springfield Echelon or one of the other pistols that uses the fire control group as the serialized part, I should be able to have both a long frame and a short frame pistol if I get the right parts correct?
One 4473 for two ?
Or am I missing something?

The FCG is the serialized part. Only one 4473.

 

[BHPSteel]

I don't know about the Echelon specifically, but the FCG is considered serialized, but even then, you can replace springs, triggers and parts of the FCG.

They're all mounted in a U-section piece of formed steel (if it's anything like a Sig P320).

That's an 80%, but you get the idea. That's what would actually be serialized.

Oh - here you go - the Echelon FCU vs the SIG P320 ... you can clearly see the serial on the upper FCU.