Does this look like an endcap strike?

[saddlerocker]

Does this look like an end cap strike, and would it effect accuracy?

Hard to get a good picture, but I noticed a small divot at 12 O'clock on the end cap.
I cleaned it up with a scraper and some q tips to removed carbon and it appears it is a divot.
Not sure if those are cracks or scratches from the scraper, but I think cracks since they are only near the anomaly.

Any opinions or insite is appriciated.
Thanks

 

[Huskydriver]

It's fine shoot it

 

[hlee]

Maybe? Do you have reason to suspect a strike? Doubtful it affects accuracy.

 

[saddlerocker]

Maybe? Do you have reason to suspect a strike? Doubtful it affects accuracy.

Eh, I have been shooting groups almost exclusively and I had one round completely miss a target at 200yds. It was very odd and I just couldnt figure it out. So I am wondering if that was due to an endcap strike.
Im not too worried about it, but I also don't know if an endcap needs to be uniform like the crown of the barrel or else it effects accuracy.

 

[Fig]

I has a strike on a 9mm Rugged Obsidian that I heard and saw the piece fly. The suppressor was direct threaded and tight. Of course, that is not a sealed can, so I got another end cap, but it is still inexplicable. I can find no reason for it whatsoever, and that a bullet could come out of a barrel at that much of an angle seems impossible, but it happened...

 

[eagle0199]

Might be time to invest in an alignment rod of some sort. Specialty tools could be expensive but a piece of rod stock or even a wooden dowel of the appropriate size would be an inexpensive option.

https://www.mcmaster.com/products/metals/steel~/tight-tolerance-low-carbon-steel-rods/

 

[saddlerocker]

Might be time to invest in an alignment rod of some sort. Specialty tools could be expensive but a piece of rod stock or even a wooden dowel of the appropriate size would be an inexpensive option.

https://www.mcmaster.com/products/metals/steel~/tight-tolerance-low-carbon-steel-rods/

I have a Geissele alignment rod and it's perfectly aligned.

 

[carbonbased]

I think if your groups are still as good as before, just shoot it but keep an eye on it.

Btw what caliber were you shooting and what is the suppressor’s “hole caliber”? (for lack of a better phrase)

 

[saddlerocker]

I think if your groups are still as good as before, just shoot it but keep an eye on it.

Btw what caliber were you shooting and what is the suppressor’s “hole caliber”? (for lack of a better phrase)

Shooting factory 5.56 and 223 loads in a Hawk Hill barrel 223 wylde.
It's a surefire legacy can FA556-212 ( 223 hole) on an MB556K brake mount.
I have had some odd fliers with AAC 5.56 77gr SMK loads and that is the group where a round mysteriously missed the target.

 

[Aaros143]

Looks like a bit of carbon buildup.

 

[Camelfilter]

... and that a bullet could come out of a barrel at that much of an angle seems impossible, but it happened...

Tumbling perhaps? Not so much the bullet at an angle.

 

[saddlerocker]

Well, I checked alignment with a Geissele rod when I put the adapter brake on and it was perfect.
Checked again because I have had a few random fliers lately.
It appears it is no longer aligned for some reason.
Rod is closer to 12 O'clock (where the endcap nick is).
Muzzle device adaptor hasnt moved, so I have no idea what could have changed.

Guess I'll have to scrub the brake and the cans mounting surfaces.

One issue is the barrel diameter doesn't let me ratchet the collar very far before contacting the barrel. (Surefire FA556-212 on MB55k mount. Med Palma 223 Wylde barrel)

 

[sinister]

Looks like a metal burr that was not smoothed (rather than a strike or a skid-past).

Are you using shims?

 

[saddlerocker]

Looks like a metal burr that was not smoothed (rather than a strike or a skid-past).

Are you using shims?

Yeah, used the chamfered thick one then the thin ones to time it.
Like I said, It was aligned origionally 100%, but seems not to be now.
you can see where the collar rubbed the cerakote off where it makes contact with the barrel. I only get like 6-8 clicks on the teeth due to barrel diameter.

 

[FuhQ]

Does this look like an end cap strike?

 

[carbonbased]

you can see where the collar rubbed the cerakote off where it makes contact with the barrel. I only get like 6-8 clicks on the teeth due to barrel diameter.

View attachment 8439024View attachment 8439025

I think that there is probably your issue. Maybe have a gunsmith turn down the barrel in that area so you don’t have any interference?

I don’t think turning it down would harm anything, but I’ll let others chime in.

 

[saddlerocker]

I think that there is probably your issue. Maybe have a gunsmith turn down the barrel in that area so you don’t have any interference?

I don’t think turning it down would harm anything, but I’ll let others chime in.

I know it’s older, but that’s a sorta weird-looking muzzle device. And teeth only on 180°?

Surefire MB556K. Pre-SOCOM surefire mount and can. It was Mil issued shit for a long time.
FA556-212 suppressor.
The suppressor collar has teeth and I'm not sure the mounts teeth are actually utilized, but I could be wrong.
The collar spins off axis so it locks by ratcheting down behind the muzzle device "flange". The slot on the bottom aligns with a pin inside the can.
I think the teeth were used for the origional "K" cans, but again I could be wrong.