Having seen the doors of BTR-70 , if they are going to get out of this ALIVE under fire and with some equipment , they probably are malicious dwarfs with rifles. NO WAY i (1.80 , 90kg.) would fit me out of this with some gear from last seat under 20 sec.
In our case the realistic distance does not exceed 100-300 metres . Pretty forested country . For longer ranges and heavier firepower there are M69 (the Chinese RPG) ,Carl Gustaf , israeli B-300 (USMC SMAW) and Milan , some M2 .50caliber HMG-s too .
Still would not want to try it.