Glock Model 18 or an MP5

I will have to say that the MP5 is my favorite......in a close second place is the UZI, a little jumpy but very fun to shoot.

a m249 saw in 7.62 ? i thought they were all in 5.56 caliber ?

m249 SAW

I'll hafta vote for the M4. My dad has a buddy that has one full auto and we took it to the creek to shoot it. Talk about cattails and water and mud/etc flying everywhere when you cracked open a 30rd mag.

okay ive shot alot of full auto in the Marines and my favorite US fieldedweapon is the M2 50cal. holy crap its fun on a tripod rocking out a can of linked ammo!

second would be the M249 SAW. if you dont know what it is... look it up its worth it, selectable 750 or 1000 rpm. takes belted 5.56 or M16 mags, integral bipod and 1 man portable, its a shoulder full of smiles!

OUTSTANDING

For up close real world work it would have to be my M16 lower with rate reducer and the 9mm integrated suppressor upper. Controlable rate of fire and no hearing loss in a building or stair well. I like the MP5 ,but the 16 lower unit allows for caliber changes by simply swiching upper units.
For fun it would have to be the MAC-11 with its rate of fire (1200rpm) its a bullet hose and not much larger than a colt 1911. The Glock 18's are also a blast.

as any infantryman ive had the chance to fire a good number of different guns but my favorite far and away is the browning m-2. its been around forever and it still kicks ass. was definitely my automatic of choice in the sand box. its recoil operated so youre not scraping carbon off a gas tube like other guns and it puts big holes in things. i also fired an mg42 before and that was a blast