Jump to content
UKV - The Place for Precision Rifle Enthusiasts
Sign in to follow this  
JR FIREARMS

Scope base/rail screw upgrade

Recommended Posts

Seen a few Sabattis lately where the picatinny rail screws have stripped out the action under recoil. I have found various causes for this which ultimately are all down to quality issues. 

It’s a fairly simple fix, especially with the CNC mill. It’s a case of measuring hole spacing, a quick CAD model, then boring out and threading for larger threads, In this case 8-40. The rail also needs machining to allow fitment of the larger screws. 

273E2B88-3F10-4074-9C98-7DCBA4F19DAA.jpeg

9A14C607-CCAE-4ECB-A912-CC0A6C22DDA6.jpeg

Share this post


Link to post
Share on other sites

Scope base screw repair and upgrades are helically boted and thread milled for better accuracy and tolerance, then checked to ensure they are within specification. Available in M4 x.7 and 8-40. 

793A1DCE-BE6B-4451-80CA-831B5B2DFFCA.jpeg

0DFBAE82-737A-4FE0-8069-2A7205DFDF04.jpeg

8DA9494A-20B0-434E-AF21-94E614598482.jpeg

Share this post


Link to post
Share on other sites

 Would it be possible to correct misaligned holes using this method ?

Share this post


Link to post
Share on other sites
9 minutes ago, Fox Tales said:

 Would it be possible to correct misaligned holes using this method ?

Yes it’s an ideal way of solving that problem. The boring of the hole and thread milling mean the old thread will not influence the new ones, which is what can happen when using the traditional method of drilling and tapping, as the drill and tap will want to follow the old thread. 

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
Sign in to follow this  

×

Important Information

By using this site, you agree to our Terms of Use and Privacy Policy