Only if Sniper and M3 are placed into separate buildings so it's technically possible but you have to go far out of your way for it.
"Far out of your way"
My proposal would be to make a special commander for this.
CP 0 A Specially trained sniper than can shoot on the move and be put into a M3 or M5 :
Cost: 370 MP ( gotta be a bit more expensive than a regular one after all)
CP 1 "Advanced Tankhunter tactics" Gives the SU 85, the Su 76, anti tank guns, PTRS Penals the ability to cloak and gives pioneers access to light anti tank mines
CP 4 " Leftover Weapons drop " Will drop a single 82 mm mortar with a crippled barrel ( I assume this can be done ) for the price of 50 MP and 10 ammo. Its only purpose is to put a demo on it and use it as a bait.
CP 5 " Enhanced Forward Base " A building can be convertet into a Enhanced Forward base for the hefty price of 200 MP and 20 fuel. In return the buildings HP get tripled and equipped with one Djuschka MG per window for self defense; you will be able to reinforce and heal your infantry at this base. Furthermore it will be possible to call in Artillery strikes , as well as recon planes from this building
CP 10 " Il2 FAB-25 strafe " a Il2 will drop 8 25 kg bombs. The description of this ability claims that it is only good against infantry, but in actuality it can cause quite decent damage to tanks, as well as one hit kill the OKW Schwere HQ too. Cost: 160 Ammo
Now we just need some ... rather interesting art for this commander as a picture ( preferably make it look like the nicaraguan president ) and all that is left is to put it on the CoH2 ingame store for the cheap price of 20.000 loot points or 10 euros.( sure ... you might need 80 hours to get that much loot points , but you still have the option to get it without paying real money ... so no pay to win ... right ? )