AR Sponsor
Posted: 9/27/2010 5:53:55 PM EDT
| I have an Armalite A2 upper with 20": pencil barrel on a Tactical Machine lower. I'm thinking of upgrading to a Tactical Machine A4 upper, keeping the same barrel. All the Tactical Machine uppers say they have M4 grooves cut in them. Is that going to be a problem with a 20" barrel? |
|
Quoted:
1. identify which extension you have on your barrel. 2. don't do anything as seen in the bottom left corner of the second photo. http://www.weaponeer.net/forum/uploads/Weaponeer/images/2010-04-27_132557_m4cuts0xk.jpg http://www.ar15barrels.com/tech/feedramps2.jpg This. Although the likelihood of having a 20" barrel with an M4 extension is pretty small. |
AR Sponsor