Posted: 10/7/2008 8:18:14 AM EDT
| Guys, I just bought a slightly used Cruiser upper. Are the M4 ramps supposed to be dremelled? Is it even supposed to have M4 ramps? It looks to me like the barrel extension doesn't have M4 cuts. How should this have been set up? Thanks! |
That is NOT ok, do to the receiver "underlaping" the extension. causing trouble. The other way around is ok, because the receiver ramps would "overlap" the extension, and it will work. Sometimes folks will dremmel them together to make a smooth transition, which is just fine. 
|