12/112 or 10/110 - Varmint/Target series...only drilled and tapped for scope mounts, no open sights, 24" or 26" barrel, blued or stainless depending on specific variation
11/111 - Hunter series...open sights & drilled and tapped for scope mounts, 22" or 24" barrel, blued only
110/111xxXP3 - Package series...no sights, comes with 3-9x32 scope mounted, 22" or 24" barrel, blued only, wood stock/leather sling installed or synthetic stock/nylon sling installed
16/116 - Weather Warrior series...no sights, only drilled and tapped for scope mounts, 22", 24" or 26" barrel, stainless steel only
The letter codes are what determines the "specific's" of the rifle...here is the list:
AK -Adjustable Muzzle Brake
B -Laminate Stock
C -Clip (Detachable Box Mag.)
F -Synthetic Stock
G -Hardwood Stock
L -Left Hand
LE -Law Enforcement
ML -Muzzleloader
NS -No Sights
P -Police
SE -Safari Express
SS -Stainless Steel
U -Ultra High Lustre
V -Long Range (Heavy Barrel)
XP -Package Gun
Y -Youth