MY TWO CENTS ON THIS, I JUST GOT MY MARAUDER RIFLE AND THE BENJAMIN HAND PUMP, THE RIFLE ARRIVED WITH ONE THOUSAND P.S.I. FROM THERE TO THREE THOUSAND PSI IT TOOK ME AROUND 200 PUMPS, AFTER THAT, TO TAKE IT FROM TWO THOUSAND TO THREE THOUSAND ONLY 65 TO 70 PUMPS, TAKES ABOUT TWO MINUTES FOR ME TO FILL IT IN.... OK... I'M 6 FEET TALL, WEIGHT ABOUT 250 POUNDS, AND I DON'T REALLY SWEAT DOING IT. BUT MY SON, 19 YEARS OLD, TALLER THAN ME, WITH MUCH LESS WEIGHT, VERY STRONG BUT LESS WEIGHT, COULD NOT MAKE IT HAPPEN, EVEN GETTING ON TOP OF THE PUMP! SO YES YOU NEED TO BE KIND OF HEAVY....AND STRONG. THOSE WERE MY TWO CENTS... GOOD LUCK! BROTHERS! AND YES IN THE FUTURE, THINKING IN BUYING A COMPRESSOR... JUST HAVEN'T SEEN THE ONE....NEED MORE INFO ON THE GUYS THAT HAVE BOUGHT ONE. SEE HOW THEY ARE DOING.