I don't have the 45 service but this is what the 4" 45 compact and the 9 subcompact weighed. I am not sure how accurate the scale is,but I weighed each gun several times with each mag and they were always the same.
sc9 with 10+1 is 2.03 lbs
sc9 with 16+1 is 2.20 lbs
45c with 12+1 is 2.53 lbs
45c with 9+1 is 2.41 lbs