Also, if you are not training your abdominals properly (i.e. sticking to crunches, sit-ups, and conventional abdominal exercises like that), then you will end up having a distended looking gut.

The majority of people do not train abdominals properly. Although the abdominal exercises such as crunches and sit-ups and such are necessary for building up the abdominals, the important muscle to work is the transverse abdominis and several other abdominal muscles located BENEATH the main abdominals that you see visibly in the mirror. These muscles serve to suck and pull the 'gut' (AKA your primary abdominal muscles) into your body and keep everything tight. The exercises required to work the transverse abdominis are very unconventional but they do work. Other exercises such as the vacuum and such are great that can be done in your car, or the comfort of your own home (no gym required).

Keep doing crunches, sit-ups, leg lifts and crap like that, and you'll end up with distended abdominals because the primary ab muscles that you see will end up overbearing for the internal ab muscles, and pull everything outwards (much like someone who is very chest heavy but never trains their back, how those guys have that hunched-over bad posture look, ever seen that? Same thing).

This has nothing to do with gear, and Trenbolone will not help this. Train your abs properly.