Yep.
Man I wish they introduce lots more guns, attachements, perks and accesories.
I found a list on Bungie.net of all the guns that have been found in videos,
Assault Rifles.
Bushmaster ACR
TAR 21
FAMAS
F2000
SCAR H
Steyr Aug
AK 47
MK14 MOD 0 EBR
M4 Carbine
M16
G3
SA80
FN FAL.
Sub Machine Guns.
UMP .45
Kriss super-V
Mini Uzi
MP5K
P90
PP-2000
Light Machine Guns.
RPD
M240
HKMG4
Shotguns.
Franchi SPAS-12
Armsel Striker
AA-12
Winchester 1200
Whinchester 1887
Sniper Rifles
Walther WA2000
SVD Dragunov
Barret M107
Pistols
Glock 18
Desert Eagle
M1911
USP .45
M9
Equipment
Riot Shield
Ice Axe
Grenade
Smoke Grenade
Flash Bang
Stun (Concussion) Grenade
Knife
AT4
Semtex (Explosive)
C-4
Attachments
Red Dot Scope
EOTech (souped up RDS)
ACOG Scope
Thermal Sights
Silencer/Suppressor
Heart Beat Sensor
Laser Module
R.I.S. (Pictanny Rails)
M203 GLauncher
GP 12 GLauncher
Perks
Matyrdom
Riot Shields
Akimbo - Dual wield sidearms.
These a Confirmed from videos, but Final version might cut some guns.
Also 3,5,7 kill bonuses are now customizable.