I got passed the first two sections and found myself stuck on the final bit which is just impoosible. I read some walkthrough and it says you need the PTRS, is this a definate? Because i don't have it and i don't really want to start the map again, any help is welcome. I have an STG-44 and a MP40.

ptrs definately helps
but its not impossible without it
just use ur cover like u'v never used it b4, and move incredibly slowly
when enemies come, move back and kill them from as far away as possible
its a biatch of a mission, but i still reckon blowtorch and corkscrew is harder on veteran