spec drawings for the inside of a BCG? [Archive]

View Full Version : spec drawings for the inside of a BCG?

Ring

12-03-11, 09:41

this?

http://i.minus.com/j6HqRwmkJ1rxA.JPG (http://min.us/l6HqRwmkJ1rxA)

Col_Crocs

12-04-11, 03:44

Took a few searches but I found this on a forum that turned up. I don't know whether or not it's accurate though.
http://www.weaponeer.net/uploads/files/8816/M4A1_-_Bolt_Carrier_face_and_cross_section.pdf
http://www.weaponeer.net/forum/forum_posts.asp?TID=12539&PN=1

**Mods: I'm not sure if linking other forums is allowed. Please let me know if it isn't so I can take it down.

rsilvers

12-04-11, 08:50

No, those are not accurate as they don't contain tolerances.

Ring

12-04-11, 10:30

just mic'ed a hard chrome RR carrier, .531 at front, the nitrided carrier was the same, .531

used both a digi and dile caliper.

rsilvers

12-04-11, 11:47

You cannot measure this with a caliper - it is not even 1/10 as accurate enough as what is needed. You need a CMM, or a special set of pin gauges.