if you're going spec ops or trying to, i would shoot for whole body workouts 3x a week. big arms are cool (don't get me wrong), but nothing says special ops like picking up a running 3 year old without breaking stride, planting your feet, or anything else. when i say total body, i mean exactly that. a sample would be:
M - squat (ass to ground) / bench / deadlift / pull up / floor wiper / clean and press (5x10)
W - lunges / push ups / floor wipers / DB curl to arnold press / deadlift with hex bar (6x10)
F - DB bench / sumo deadlift / chin ups / dips / floor wipers / the sled (5x10)
special ops isn't about how much you can curl (isolated movements don't mean jack in a military setting where you're not working with handles on everything you pick up, or might have to press it over your head after curling it), its about getting something from point A to point B as fast as possible. its great being able to preacher curl 100 lbs, its even cooler (and useful) to be the guy pushing the broken hummer down the street. thats my 2 cents.
also, this workout will put size on you, by nature of incorporating the basic powerlifting movements (bench, squat, deadlifts, clean and press) while also adding arm size (dips and chins). routine is altered a bit every other day to make sure you are always doing similar movements, but ensuring its a little bit different to stimulate maximal growth.
lastly, take this routine to your instructor, or someone in the class (or ask one of them to put a routine together for you), i guarantee they will tell you its similar to what you will be doing in training - and its great to be the guy in class setting the standard for everyone else.
i signed up for police academy, and did 71 push ups in 60 seconds (all counted so my form was good, and did a drug test, so i wasn't on gear or PH's), and setting the standard for everyone else makes your life much easier in academy.