Get MG42 or a Sniper next time. The meta game has changed so you should adjust your build.
Shocks will annihilate Grens 1 on 1
The MG42 has seen better days. I think it's still an essential build especially against an early shock heavy force, but it's too easy to lose one right now. The increased damage from small arms fire is bad enough, but the setup/breakdown time is the killer. Half the time if you try to retreat a 4 man MG42 as soon as you think it's in danger the squad still dies. The guy packing up the MG almost always seems to die before the other squad member which resets the breakdown time and essentially dooms the unit. Now you've not only lost the manpower but the enemy will usually have some cons nearly to pick up the free MG42. You have to babysit your MG's almost as much as you do your snipers these days.
All said though, an MG42 / Sniper combo can wreck shocks if you can lead them back into the MG42 arc and get some quick shots off with the sniper. You just can't leave the MG on its own and you have to move it so they don't come back and set up a flank on it. Easier said than done throughout the course of a game.