Lots of Firepower!!

When playing airsoft, some would think "Is there a way to carry more ammo?"
yes.

there are a couple ways to carry a huge gigantic overload of ammo.

This is one of the current ways to do it. the FN MINIMI (M249 SAW) is the current US Army support weapon. The reason we use it is because its lighter than an M60 (weapon and ammo) and its easier to control and aim for some people. I personally prefer to have one of each (though different variations).

Here you can see clearly a better way to carry a bullet sprayer. The shorter barrel, the aiming aid and the shortening stock reduces the weight and allows for better moving and if needed, stowing of the weapon for use at another time. Or it helps when its in the car I can put it in my trunk better.

This is something I would carry often if I had one. This is either an M60E3 or by military terms a Mk43. This might not be optic friendly but it can do much damage and level the play field.

the best way to make this do what you need it to do is simple, yet not so simple.
for an indoor which for the purpose of this blog will be the M249 SWP it will look something like this.

I'd not be so inclined to put an optic on it for CQB since its more of a generalized spray it all over the fucking place. a 6.04mm barrel and a 80 spring would work nice, and then a 9.6v battery will help me spend my ammunition. If I went with an optic, it would be something simple like a red dot. Maybe a 2x red dot since it can fire farther away and spend more ammo.
For a field LMG, it will likely be a Mk43 with a 6.03mm barrel and a 100 spring with an 11.1v lipoly battery and a super badass mosfet or resettable fuse.

Some cannot go with this option. so there is a cheaper alternative.