View Full Version : Have an A2 gas block front sight and calipers? I need the dimensions!

07-14-2010, 7:27 PM
I'm want to build my own standard A2 gas block front sight as a learning project on the CNC. Since I don't have one, I'm hoping to get all of the dimensions from some helpful fellow Calgunners. I realize that this part is quite cheap to purchase, but it's a learning exercise not a cost saving measure. :)

For reference, this is the part I'm hoping to machine myself:

Or, even better would be the JP Enterprises adjustable version:
http://www.brownells.com/.aspx/sid=52861/pid=7592/sku/A2_Style_Gas_Block?utm_medium=shoppingengine&utm_source=googlebase&mc_id=10000&gdftrk=gdfV21820_a_7c187_a_7c745_a_7c452000065_d_4 52015110_d_4558

Many thanks!!

07-15-2010, 11:12 PM

07-15-2010, 11:26 PM
Ummm, what dimensions exactly? All of them? Including angles of the ears and front edge? You're better off searching for a drawing online

07-17-2010, 12:55 AM
You are learning CNC and don't own calipers? Come on now. Most AR front sights are forged or cast, not milled from scratch on a CNC.

07-17-2010, 3:49 PM
I have calipers, I don't have a standard front sight.