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Based on the PDF file of the SS17 manual, it is the same internal system as Stark Arms SA17. Should be both OEMed by VFC. So, internals are "partially compatible" to TM G17.
The magazine is compatible except I am not sure about the release valve and the required hammer spring strength.
The sights are different. Slide also slightly different.
I am not very sure about the blow-back assembly but I think they are slightly different.
The slide rail part on the frame is very different.
The hammer housing assembly is mostly the same.
Recoil spring/spring guide unit is different but may be interchangeable.
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