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Discussion Starter #1
So what's a Mk-II? I found this in WikiPedia:

In 2013, the Five-seven MK2 model was introduced, replacing the USG
model.[17] The MK2 model has cocking serrations on the front of the slide,
all black controls, and slightly different iron sights.[17]

And elsewhere read the "controls are all black".

Are all these differences just trivial cosmetic changes, or more fundamental
differences? I read the slide (cover?) is different for the sights, that seems
pretty major (in a minor sort of way). Barrel? Magazines? Frame/receiver?
All controls in the same place and work the same way?

Is the "correct" name "Mk-II", or "USG Mk-II", or ??? Are FDE/ODG colors
still options? (Or is "FDE" a "model name" in its own right?)

Not [yet] being vested in a supply of magazines, sights, barrels, and other
assorted spare parts, would I want my first purchase to be a Mk-II? (So
that going forwards I accumulate MK-II-compatible barrels (threaded),
magazines, and all the related riffraff?

Wondering...

-RDH
 

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The Five-seveN Mk II is the latest generation. Any retailer selling a new FsN, will probably be selling the MK II; it comes in black or fde. The earlier models occasionally show up on websites, but at much higher prices. I believe the magazines are inter-changeable; I've seen threaded barrels listed as separate versions so they are probably not. I don't know about the other parts; other, more knowledgeable, members on here will be able to help.
 

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There are many internal differences in favor of the MKII. Barrel is revised around the take down assembly. The slide is a single machined piece on the MKII. The frame is heavier on the MK II, but the slide is lighter (ends up same weight total as MK I). Jay did an entire video talking about dimensional differences. It's on YouTube somewhere.
 

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I believe there has also been a slight change in the magazines being shipped with the Mk II's (beefed up the upper lip a bit is what I was told).
 
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