Remove magazine by pressing release button; be sure chamber is empty
Hold pistol in the right hand; with left forefinger press dismounting latch release button and with left thumb rotate dismounting latch clockwise until it stops
Pull forward the slide barrel group with locking block, recoil spring and spring guide
Slightly press recoil spring and spring guide (spring and spring guide are under tension: pay attention)
Lift spring guide and recoil spring, letting the later stretch slowly
Press locking block plunger
Take out the barrel locking group from slide
No further disassembly is recommended unless done by a gunsmith.
Assemble in reverse order. When rotating dismounting latch make sure that slide is in its normal position (align with rear slide of frame).