The top shell, the IR cover and the acrylic window are one solid part and can't be disassembled. (They pop out with a bit of force but wont go back in as well without some sort of glue)

The Flipper Zero only uses two types of screws:

Long screw size is M1.7x8

Short screw size is M1.7x4

Eject the microSD card (if present) by pressing it with your fingernail.

Use a PH0 screwdriver to unscrew the four long screws holding the back cover.

Press the middle of the top cover on both sides, one by one, to release the latches that hold the back cover in place.

Once the latches are released, you can remove the bottom cover.

The board with the NFC antenna is glued to the bottom cover with adhesive tape.

To remove the board, gently pry one of the edges of the board with a plastic pick to peel off the adhesive tape.

Gently pull out the rest of the board.

Use a PH0 screwdriver to unscrew the two short screws that are holding the chassis and top cover together.

Take the chassis out of the case.

Disconnect the battery by prying the connector with a plastic pry tool and pulling it out.

Disconnect the large ribbon cable from the board. Use a plastic pick to lift the latch up to release the locks.

Once the connectors are unlocked, carefully pull out the ribbon cables.

Unscrew the short screw holding the iButton board in place using a PH0 screwdriver.

Once the screw is removed, carefully remove the iButton board.

To disconnect the flat cable from the iButton board, use a flat screwdriver to carefully release the lock by pulling the latch up, then pulling gently on the ribbon cable.

Once the connector is unlocked, gently pull the cable out of the connector.

To release the battery chassis, gently rock it back and forth while pulling the two parts apart.

To remove the NFC RFID board, release it from the latches in the sequence shown.

Release the board from the latches by pressing on the edge of the chassis near the specific latch in the specified sequence.

Take out the vibration motor.

To remove the lace mount, use a PH0 screwdriver to unscrew the short screw that is securing it in place.

Remove the lace mount from the chassis.

The battery is attached to the chassis with double-sided tape. To remove it, use a plastic pick to gently peel the battery off the chassis.

Remove the battery from the chassis.

Use a plastic pick to lift the latch up to unlock the connector.

Pull the flat cable out.

Unscrew the two short screws holding the button chassis using a PH0 screwdriver.

To disconnect the button chassis and the board, press the latch on the side shown below.

Remove the button chassis.

Disconnect the screen ribbon cable from the board. Use a plastic pick to lift the latch up to open the lock.

Remove the cable from the board.

To remove the screen you need to desolder two contacts.

To remove the buttons you need to release the latches.

OK

D-pad

Back

Release the latches with a flat screwdriver. You need to be careful with the springs under the buttons.

Use a flat screwdriver to release the light guide from the chassis.

Pull the light guide out from the inside of the chassis.

Here you can see all the parts laid out together.