Leica M5 and collapsible summicron

Can anyone tell me if it is safe to use a Leica Collapsible 50mm Summicron on a Leica M5? Or will it damage the internal light meter arm? Thanks.

It will break the meter arm if you collapse the lens.

Using excisting accessoirs on the Leica M5 :

https://www.l-camera-forum.com/leica-wiki.de/images/6/64/Leica_Fotografie_6_1971.pdf

Thank you for this info. I have been looking at other forums and somebody wrote this
'I can assure everyone it is OK to collapse the 50mm Summicron on the M5. I took very careful measurements on mine. I made a depth gauge from heavy card stock to test the dimensions. There is enough clearance with the lens collapsed. Here's what you can do if you want to check for yourself. With no film in the M5, open the back. collapse the lens slowly while you watch through the back door. The lens barrel will bottom out before it reaches the meter stalk.'