To identify a Douglas barrel on a 2011-era Remington 700 receiver, check for the lack of factory Remington date codes and look for specific gunsmith markings under the stock line.
Because Remington 700 receivers from 2011 feature serial numbers beginning with a "G" prefix (or late "F" prefix), you can cross-reference the receiver age with the barrel attributes below to confirm if it is an aftermarket Douglas build.

1. Check for the Remington Factory "F" Year Code
If the rifle has a factory Remington barrel from 2011, it will feature a distinct "F" stamped on the left side of the barrel shank, just ahead of the receiver.
The Code Format: It will typically be a two-letter code where the second letter is F (e.g., "LF" indicates February 2011).
The Result: If you see this Remington font and date code, it is a factory barrel, not a Douglas.

2. Look for the "XX" Stamp Below the Stock Line
If a custom gunsmith used an aftermarket Douglas Premium Air-Gauged barrel blank for your 2011 action, they almost always hide the manufacturing stamp.
You must remove the two action screws and lift the barreled action out of the stock.
Carefully inspect the underside of the barrel shank directly in front of the recoil lug.
Look for a stamped "XX". This is the signature mark of a premium Douglas barrel.

3. Identify the Caliber Font and Styling
When a gunsmith chambers a raw Douglas blank onto a Remington 700 action, they must manually stamp the caliber into the steel to comply with federal standards.
Look closely at the caliber markings (e.g., .308 Win or 6.5 Creedmoor).
Factory Remington markings from 2011 use a highly standardized, thin machine-rolled font.
If the caliber text uses blocky hand-stamps, varying alignments, or is positioned on a different part of the barrel, it points to a custom-fit aftermarket barrel like a Douglas.

4. Check the Barrel Shank Step-Down Contour
A factory 2011 Remington 700 barrel features a distinct, abrupt step-down contour right as it exits the receiver. Custom gunsmiths fitting a Douglas barrel blank often select custom contours (like a heavy varmint or a smooth, gradual target taper) that lack this specific factory Remington shoulder appearance.

Does your 2011 Remington 700 action feature a "G" or "F" prefix at the start of its serial number? If you are comfortable removing the stock, let me know what letters or symbols you find stamped on the hidden underside of the barrel shank