Suppressor aligned safely? - RESOLVED

RacerX

Professional Knucklehead; aka Jeffncs / RacerX
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I used a drilling rod from McMaster Car to check barrel-muzzle device-suppressor straightness... assuming the rod is straight, is this a safe alignment?

As you’ll see on the picture, the rod favors one side but it’s a clean pass through the suppressor with no touching at all. When I spin the rod from the breach end while it’s in place, the tight spot remains in the same spot on the suppressor giving some level of assurance that the rod is straight.

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@BigWaylon

I’m posting this here so others may gain from the question / assessment.
 
I’ve never done anything but eyeball mine with the BCG removed. Those rods are some kind of black magic!!
 
Makes me overthink it that’s for certain!!! But you already know I worry too much as it is...

just put a fresh cut on the rod which makes it look even tighter. Hate to test the YHM warranty...

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Is the rod close to same diameter of bullet?


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The rod diameter is 0.2969 so yes as that’s a .300blk barrel.
 
You took a piece of steel drill rod that’s .2969 in diameter and shoved it down a .308 barrel how far? I ask because the rod is going to sag some, right.

If you have a laser for bore sighting try it with a piece of frosted tape over the suppressor opening. If it’s not pretty well centered I would expect poor accuracy.
 
The rod diameter is 0.2969 so yes as that’s a .300blk barrel.

Take the upper off. Look down the barrel from the breach end and look towards a light. If it looks clear shoot it and find out.


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@JimB

the rod is 36” long and runs the full barrel length. It’s snug, but not tight. Also - the tighter side remains the same regardless of the upper’s position (left side, right side, upright or upside down). The favored side also remains the same when I spin the rod.

There’s def a misalignment... am I in the clear or should I have a smith check the shoulder for square?
 
You took a piece of steel drill rod that’s .2969 in diameter and shoved it down a .308 barrel how far?

I just checked the diameter of the pilot portion on a CNC Warrior .308 bore alignment rod and it's 0.297-ish so he has the right size.
@Jeffncs if you're close enough to Charlotte you can use mine.
Personally, I would not shoot it if that's actually how the bore checks out.
 
Roll the drill rod on a flat table, mirror, or piece of plate glass to confirm your alignment rod is straight.

A 36" pc of drill rod with a diameter of less than .300" can droop, or the end can be bent slightly when sawed from a 12' stick. It doesn't take much to bend it out of alignment.
 
Roll the drill rod on a flat table, mirror, or piece of plate glass to confirm your alignment rod is straight.

A 36" pc of drill rod with a diameter of less than .300" can droop, or the end can be bent slightly when sawed from a 12' stick. It doesn't take much to bend it out of alignment.


I totally agree. I rolled it on my granite countertop and it was almost perfect the full length...not a wobble.

It seems that I found the issue was with the muzzle device itself. A replacement flash hider resulted in a near perfect alignment.
 
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