Will Astra 600 slide/ upper run on a 400 lower?

[HKARAK]

Will Astra 600 slide/ upper run on a 400 lower?

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[Aragorn243]

While I can't give a definitive no, I would not think so. The 600 in theory is just a re-barreled 400 but the frame is shorter and the magazine release is different. The magazine well is also a bit longer in the 600.

[Low & Slow]

Don't know if it's just mine, but the extractor groove is smaller on my 800's barrel, for one.