Jump to content

Pinning m4 c-stock?


Recommended Posts

I’d get a pin that is smaller diameter than the button spring. Then cut it to length so the button cannot be depressed with the pin inside the spring. I’d leave just a small amount of play so you can depress the button slightly when tapping the retaining pin in place. 

This would be a lot easier than drilling a hole thru that steel button, then tapping it for a screw. The only way to get the hole drilled properly would be to indicate it in a lathe. Preferably on a 4 jaw Chuck. Trying to punch out the hole with a drill press is likely going to be off. 

Link to comment
Share on other sites

I knock mine most of the way out with a Starrett punch while pressing the button in slightly. The punch isn’t quite long enough to knock it all the way out. So I then use a set of transfer punches.


The larger diameter Starrett punches will last a lifetime. The smaller ones are consider consumable and are easily destroyed. Particularly 3/32 and 1/8 punches. 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...