Best way to clock a compensator?

[johnson]

I have a BC 1.0 installed and it looks a tiny bit off. Could be my eyes but I don't know. What is a sure fire way to get it perfectly at 12:00?

[Mega]

Easiest way to get it right is by using a crush washer.

[Hmac]

I use a crush washer and eyeball it. I don't think perfectly at 12:00 is necessary.

[shootist~]

If you are running a rail, eyeball down the rail and align the 3:00 or 9:00 wrench flats on the BC.

[Marty916]

The row of 2 vents located directly opposite of the solid section are machined at exactly the 12 o'clock position. This row should be in line with your front sight. The two upper nose vent holes should be tangent at exactly 90 degrees from your front sight. If your comp is off a few degrees either way, the impact on performance will not be noticable.
Marty

[Saint Michael Arms]

I am OCD and eyeballing irks me as well.

If you have the barrel off the upper, I like to mark a pencil line down the length of the barrel for indexing purposes.

Usually the middle of barrel markings straddle the exact 12 oclock position on the rail.

[johnson]

Thanks for the replies. Ill just leave as is and not worry about it. I wont have a chance to shoot it rapidly until Saturday but it already feels good with slow fire in standing position.

[mark5pt56]

Take a small straight edge and insert it into the crosss slots of the Fh and it's easier to check level from that.

[Keith E.]

I'd say shoot it and see what position works best for you.

Keith

[The_Hammer_Man]

I've had a few different brakes that I've HAD to clock off-true in order to get consistent performance from the barrel.

Usually you only have to take it off true (12 o'clock) by a few degrees one way or the other.

For example, if your weapon consistently "hops" right no matter what you do... clock your comp a bit to the left (11:30ish as you look down the barrel) and that hop magically disappears. Same method, only reversed for a "left hopper".

Now if you have a top notch (kreiger,woa,compass lake, etc) barrel mounted you'll probably not have to do this as often or as much. YMMV.

Regards,

TJ

PS: I've had a couple M4's from "commercial sources" (no names) that I've had to clock the brake as much as 7degrees off true.