more of a real life question rather then mod related....

[TexLax]

Originally Posted by .Intense

According the C7 Wiki and the M16 Wiki the C7 Wiki has a few notice-able differences.

M16:
Weight 8.5 lb (3.9 kg) loaded
Length 1,006 mm (39.5 in)
Barrel length 508 mm (20 in)
Cartridge 5.56 x 45 mm NATO, .223 Remington
Action Gas-operated, rotating bolt
Rate of fire 750 to 900 round/min, cyclic
Muzzle velocity 975 m/s (3,200 ft/s), 930 m/s (3,050 ft/s) (see Variants)
Effective range 550 m (600 yd)
Feed system Various STANAG Magazines.

C7

Length 1,006 mm (39.5 in)
Barrel length 50 cm (20 in)
Cartridge 5.56 x 45 mm NATO, .223 Remington
Action Gas-operated, rotating bolt
Rate of fire 700-800 rpm (cyclic)
Muzzle velocity 925m/s
Effective range 550 m (effective)
Feed system Various STANAG Magazines.

With a shorter barrel length the effective range is about the same, Its ligther, fully automatic capable, same ammunition. Has more "upgrade" rails, fires at a much more consistant rpm (rounds per minute) and is more versatile.

I would choose the C7 over the M16 anyday.

it says the barrel length is the same

[Epim3theus]

8 mm difference