he has a TM m14 with the g&p ebr conversion now... as well as a number of other guns. I don't think it's a matter of sucking without the gas ebr.. more of a people sucking on his epeen every time he's in a video, so scout is filming other folks. Also I think dedalus really only plays at section 8, while scout has been off filming at other sites lately.
If you watch the ebr outtakes video you get to see how often that gun would just vent gas. As a result I think scout would follow him around for a half a game just to get 1 shot of it actually working.
I futz with V2s, V3s and V6s. I could be wrong... but probably, most likely not, as far as I know.