one arm of the blowback unit has a small indentation in it, use a small flathead to pull that arm slightly towards the center of the slide then turn the slide upside down and hit it against your hand the unit should fall out. For the barrel turn the screw underneath and pop the small plate up make sure not to lose the spring and pin! Hope this helps I'm at work and don't have part numbers.
Cheers
Dirtdiver
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