Funny jerks.
Ok, see, the M16A4 in INF has what? A rail grip, not sure, but I think it has, hasn't it? Or it hasn't?
Ok! So. Putting an M203 on the rail is what? A more logical step(?). A consequence(?). A fact(?). An universal law(!... ermm, ?).
Ok, IMT HQ has only the old used A2 style M203's for their INF soldiers, a good reason, or not, maybe, a liddl liddl bit? Sort of.. if you wish.
Indeed, some dudes over here like extra effort and put the A2 thingingz on their new fresh manufactured M16A2 (/edit: M16A4).
Ok, maybe, and I just say "maybe", the Israelis manufacture the rail grips aswell, not that I EVER saw this, but maybe some hidden, invisible, invincible Special power Force does? And yes, they probably choose to take the extra effort to replace the whole rail grip with the old A2 hand guard M203, just not to put the old stuff in a museum in the palistinenzian neighborhood, Yanowmse?
@chuckus:
Yup, exactly that.