-It takes about 35 second to kill a T-70 with 1 shrek assuming no misses
-At max (35) range there's about a 55% chance of missing.
-To kill a T-70 with 2 PTRS's it takes about 17 seconds. With 0 chance of missing at max range.
So yah, nah. I'll take PTRS's instead of shreks when facing off against light vehicles any day.
At the same time it takes ONE salvo from 3 Shreck squads to kill T-70 and they would actually be able to kill T-34 with them.
I actually tested this; a salvo of 3 shreks killed the T-70 only 5 out of 20 times lol. Dat max range miss chance.