Can you help me Identify this barrel?

[titsonritz]

Windage Adjustable (Edit to Add) Similar to the WOA, but uses 4 set-screws to adjust the windage.

F Marked Front Sight Base .750: Preban

CLE Windage Adjustable front sight base, Pre-ban configuration. This sight base is complete with National Match tapered front sight post, spring, detents, and four set screws for setting up the bas…

compasslake.com

The set screws are for setup, it uses taper pins to install.

 

[MTpockets]

This is my guess, it would be in line an older MK12, which that barrel suggests to me...
https://www.precisionreflex.com/ar1...lip-up-front-sight-with-750-w-set-screws.html

Old MK12's used a gas manifold with 2 set screws 180 degrees from the gas port.

Corrected by @titsonritz MOD0 used PRI FSB

 

[MTpockets]

The set screws are for setup, it uses taper pins to install.

Negative

 

[titsonritz]

Negative

Says it right in their description.

 

[titsonritz]

Old MK12's used a gas manifold with 2 set screws 180 degrees from the gas port.

That would be a Mk12Mod1 and later.

• Gas Block: Badger Ordinance Mk12 gas block, Daniel Defense Mk12 Gas Block

Mk12Mod0

• Front Sight: Precision Reflex Folding Front Sight Gas Block

 

[MTpockets]

Says it right in their description.

It says "Tapered Front Sight Post" nothing about tapered pins.

But yes, I was incorrect on the MOD. The PRI was MOD0

 

[titsonritz]

It says "Tapered Front Sight Post" nothing about tapered pins.

But yes, I was incorrect on the MOD. The PRI was MOD0

I stand corrected on the taper pins.

I guess that makes us 1 to 1.

 

[MTpockets]

I stand corrected on the taper pins.

I guess that makes us 1 to 1.

You didn't factor in my Memory Handicap of 30.

Next time, I am going to use my "Phone a Friend" option. (I will start looking for friend now ...)

Some youngster, on a PS5, probably knows more than I have forgotten about weapon configs and specs.

Without knowing the length of the barrel, I am going to guess Service Rifle Barrel. If the length turns out to be 18 inches, I am going to be stubborn and guess that it was cutdown. Mainly because of the date and the contour.

 

[Clamgrabber]

You didn't factor in my Memory Handicap of 30.

Next time, I am going to use my "Phone a Friend" option. (I will start looking for friend now ...)

Some youngster, on a PS5, probably knows more than I have forgotten about weapon configs and specs.

Without knowing the length of the barrel, I am going to guess Service Rifle Barrel. If the length turns out to be 18 inches, I am going to be stubborn and guess that it was cutdown. Mainly because of the date and the contour.

It's a 20"

 

[MTpockets]

It's a 20"

NRA and CMP High Power Service Rifle Competition was very popular back then. (might still be...ask @ron )

 

[titsonritz]

You didn't factor in my Memory Handicap of 30.

I'll give it to you if you're 30 years older than I.

 

[ron]

NRA and CMP High Power Service Rifle Competition was very popular back then. (might still be...ask @ron )

Yes this is a popular high power rifle competition Barrel. Compass Lake engineering is a very popular with many of the top shooters. Typically these barrels are changed out every year or two. Probably the throat is worn out and will not shoot the 80 grain bullets well. But many times these barrels with a worn throat will shoot the lighter bullets great at a hundred yard reduced course

 

[JuglansRegia]

Yes its a match barrel set up for an adjustable front sight base. Its so you can zero your rifle by adjusting the front sight base with the set scews so your rear sight is centered and has an equal amount of available left and right windage. My guess is that if a service rifle competitor took that off, it will have at least 5000 rounds through it