AR Sponsor
Posted: 3/8/2012 5:23:00 PM EDT
| I am not sure if this is the correct place to ask this question; however, since I am in the process of building my first AR (just waiting on my barrel from (YHM) I thought it might be as good a place as any. What are the T numbers on the rails on the uppers? Thanks |
| They are for index position referencing, so you can attach things in the same position. Uppers only have a top rail so the numbers begin with T for top. Railed handguards have four sides and their numbers start with T for top. R for right, B for bottom, and L for left. |
AR Sponsor