From that chart, gas tube roll pin 0.312 long, 0.081 diameter. Commonly available 5/64 size pins (0.078) seem to work fine and pins obtained from various parts vendors measure the same as common 5/64ths pins.
I found this by using google. You should be able to find this pin at Ace Hardware or an auto parts store.
Years ago I bought spare detents, springs and roll/compression pins for the AR-15. I owned several AR-15?s and most of my Friends plus all the other Troops were issued AR-15?s. Those spare parts came in very handy but didn?t amount to much money.
I found this by using google. You should be able to find this pin at Ace Hardware or an auto parts store.
Years ago I bought spare detents, springs and roll/compression pins for the AR-15. I owned several AR-15?s and most of my Friends plus all the other Troops were issued AR-15?s. Those spare parts came in very handy but didn?t amount to much money.