No, he's not, because those are already released and made by Romka.
He did reskin them, though, and will be using them (with permission, I assume) in The Core.
Striker: Yeah, it's nice. But the leftmost tunnel is a bit blocky, you should redo it with more brushes and smoothing groups.
EDIT: Oh, Urby! Are you using Ambient.Impact's SD Weapons for V_models? Because if you want, I can send you a version of his Shotgun with the stock unfolded to match Romka's Hgrunt model. It's Op4 arms, but you should be able to port it to HEV arms (or, in fact, start from the original HEV model and rotate the stock yourself) in no time flat.