Came across this info on another forum about scavenger weapons and ammo crate locations.
AS Val - 21/21 - no attachments
PDW-R - 21/21 - no attachments
MP7 - 21/21 - no attachments
M5K - 21/21 - no attachments
PP-2000 - 21/21 - no attachments
UMP 45 - 26/26 - no attachments
PP-19 - 55/0 - no attachments
P90 - 50/0 - no attachments
Spas 12 - 5/10 - RDS Laser Flechette
870 MCS - 5/10 - RDS Laser Flechette
M1014 - 5/10 - Holo Laser Flechette
DAO-12 - 8/8 - Kobra Laser Flechette
MK3A1 - 8/8 - RDS Laser Flechette
SVD - 11/11 - ACOG Grip Laser
M98B - 6/6 - ACOG SPB Laser
Mk11 Mod 0 - 11/11 - RDS Grip Suppressor
Crossbow - 1/9 - 7x or Kobra
QBZ95b - 31/31 - Holo Laser HB
MTAR-21 - 31/31 - RDS Grip Laser
ACW-R - 31/31 - RDS Grip Laser
SCAR-H - 21/21 - RDS Grip Laser
A91 - 31/31 - Kobra Grip Laser
G36C - 31/31 - Holo Grip HB
G53 - 31/31 - RDS Suppressor Laser *
SG553 - 31/31 - Holo Grip HB
AKS-74U - 31/31 - Kobra Grip Laser
SCAR-L - 31/31 - Holo Grip HB
AK74-M - 31/31 - Kobra Grip HB
G3A3 - 21/21 - ACOG Grip HB
PKP PECHENEG - 100/0 - Kobra Bipod Laser
M249 - 100/0 - ACOG Bipod Laser
*Note the attachment combination of suppressor AND laser on the G53, a setup not permitted in the normal customisation menu. This is the only attachment combination that can't be recreated outside of Scavenger.
Fire mode - When changing the fire mode on a weapon in Scavenger, this preference will be remembered for the next time you pick up that same weapon
DICE has kindly included ammo crates in scavenger mode. These will instantly refill all weapon ammo and frags, but you have to approach the front face of the ammo crate. There is one for each map. The locations are...
Markaz Monolith - In the central area of the large, heavily ruined building (where B is located atop the escalator). As there are 3 floors of gallery levels directly above this ammo crate, it can be a bit of a death trap.
Azadi Palace - The ammo crate is in an outdoor location here, approximately half way between A and B flags. If moving from A to B, on approaching the ruined palace, there is a large staircase giving access to the first floor. The ammo crate is in the clearing to the left of this staircase. Check for enemies covering the ammo crate from any of the elevated positions given a gallery view of the crate.
Epicenter - The ammo crate here is toward the edge of the map. There is a swimming pool on one corner of the map. If you head from here to A flag, keeping an eye out on the left of the map, you will see the ammo crate in front of a large concrete wall.
Talah Market - This ammo crate is on the large road running down the East side of the map (at the south end). To get here, wither head east out of B flag onto the road and look south. The ammo crate is beside the central reservation on the road. Alternatively, from E flag, head out of the main garage opening, left and then immediately right through the passageway. The ammo crate should be roughly in front of you.