Shield 1.0 and 2.0 frame differences

[tbird]

What are the differences between the Shield 1.0 and 2.0 frames. My wife and I have several 9mm 1.0 shields with thumb safety’s and a 2.0 PC shield 4 inch without thumb safety. My dad and I were in the process of building a 4 inch with an optic core slide and a 2.0 frame with thumb safety. I have not been able to find the frame so I am asking the differences because if there is no structural differences other than where the trigger stop is located I want to use one of the 1.0 frames and swap the PC frame parts over to it. I want to complete it in honor of him. He passed away a year ago tomorrow and I want to finish it for him. Any assistance will be greatly appreciated. Thank you.
tbird

 

[gunny4053]

I have a 1.0 and a 2.0 Shield 9mm. Other than the trigger internals, the front serrations on the slide, and the new texture, I can find no differences between the two.

 

[RMFnLA]

They are the same.

I am building a 4” upper for my 3.1” 1.0 using a 2.0 PC slide, and S&W assured me there is no difference.

More importantly, I have the 4” slide and it works perfectly on the frame.

Hey, anyone out there have a 4” shield barrel for sale?