Special Ops soldiers,
This is an area that I have some experience with.
Rangers-Only after they get to about E6, and then if they are juicing (I know that the CSM of one of the Bats I worked with, when asked what the best thing for getting big arms (the guy was HUGE), he answered “A 12 week cycle”. Almost all the big guys who are clean also have the ‘ruck gut’ going on, also.
SF-Rarely will you see a large, and lean, Operator. Most of the big guys suffer from ‘runner’s syndrome’ (ie, a little extra around the middle).
Currently, most SOF (and infantry, for that matter) are spending about 1/3 of their time deployed (meaning: they are in combat, or threat of combat, daily). This is not conducive to getting ‘ripped’, what with the work schedule, the missed meals, the sleep ‘schedule’ and just general stress levels (it starts to knaw at you when you when you hear gunfire every 12 minutes or so, as one does when living in Bahgdad). The guys going through Q-Course can get pretty big (at least in Phase 2), but the general trend was more towards the endurance activities, that I witnessed.
SEALS-Very little experience (I have worked with a grand total of 3 different platoons <42 Swimmers> and 1 Delivery Boat Crew (don’t know the acronym), and a few SEALS who were in Bragg for the 18D course. Of those, I saw two big guys, and one GIANT. The big SEAL and the giant (boat crew) were both obviously juiced, not as bad as the guy on the shitty version of The Longest Yard, but still obvious. The other big guy, also Boat Crew, was from American Somoa, so go figure.
My understanding of the Navy and its offshoots, from talking to former members here, at school, is that some of the guys blow up on their floats (especially Pacific Fleet guys), due to the availability of drugs. The same thing happened in Iraq, with my battalion, we had some guys who just exploded (meaning gained 25+ pounds while working as a combat infantryman). Just maintaining bodyweight for the clean guys was often times difficult.
So I guess I am saying that the more time you spend in garrison (or equivalent like a boat), the higher your chance of getting big, cleanly. But if you are fighting, you better have some ‘help’.