here are the specs on the rifle.

Barrel:
Chrome Moly Vanadium
M4 Feed Ramps
20" Length
1x9 Twist
A2 Flash Hider
Manganese Phosphated
Phosphated under Front Sight Base
Taper Pins on F-Marked Front Sight Base
Threaded Muzzle
Heavy Profile
Chamber:
5.56 X 45 mm
Bolt And Carrier:
Phosphated 8620 Steel Carrier Assembly
Carpenter 158 Bolt HPT/MPI Tested
Heat Treated and Plated
Mil-Spec
Chrome Lined Carrier Interior
Carrier Key - chrome lined, attached with Grade 8 Screws
Properly Staked & Sealed Gas Key
Handguards:
Standard Length
Aluminum Delta Ring
Single Heat Shield
Upper Receiver:
Forged 7075 T6 Aluminum
Flat Top With M4 Feed Ramps
Hard Coat Anodized
Mil-Spec
Ejection Port Cover and Round Foward Assist
Right Hand Ejection
Bore's surface is coated with dry film lube, over the anodized surface
Lower Receiver:
Forged 7075 T6 Aluminum
Hard Coat Anodized
Mil-Spec
Aluminum Triggerguard
Semi-Auto
Aluminum Mag Catch Button
Buttstock:
Standard A2 Black Zytel
w/trap Door Assembly
Weight:
8.0 lbs Empty
Length:
39.5"
Accessories:

1 x 30rd Magazine
Gun Lock

No the barrel on this rifle is not chromed lined.

Del-ton's webpage says it has a chrome moly-vanadium barrel. Which is not the same thing as a chrome-lined barrel. del-ton.com/DTI_20_Rifle_p/rfth20f-0.htm It does not ay-
"CMV" barrels are of high quality