I found a way to get 3 smg nades on c17_06a
Here’s a video: https://www.youtube.com/watch?v=cplSEWocLNM&feature=youtu.be
Destroy the first crate with an SMG nade so it drops one on the ground. Don’t pick it up, abh down to start the sequence, and destroy the crate in the corner. That will also drop an SMG nade. Then take another crate and destroy it around the 2nd or 3rd pillar. Pick up the nade that it drops, then go collect the others on the ground.
I don’t know the best way to use the extra SMG nades, or if it is even all that helpful in the route at all. There is really no downside to doing this strat though, so I figured that I’d share it.