Sure looks like it to me!

 

Looks like a crack. Can’t say I’ve seen a crack in that area before but maybe others have.

 

On the very early SAI Texas M1A receivers it was determined the op rod track was not cut far enough back resulting in similar wear patterns. Extending that track solved that problem. I always shoot factory GMMK and avoid hand loads in my vintage M1A’s and have never had a cracked SAI receiver so far. Back in the day shooting hand loads in the SAI M1A’s voided the SAI warranty.

 

My thoughts too. It doesn't quite look like a dog hair...

 

Does look that way. Wear pattern on receiver indicates op rod and bolt coming back and making lots of contact. Our Forum gun smiths can speak to that. Is it a factory built rifle or private build and whose receiver is it and vintage?

 

Can’t be sure without a hands on inspection or some pictures from under the receiver.

 

Can you see the same in the inside surface of the receiver? Does look to be an impact induced crack as mentioned above from the op rod and bolt moving rearward too far you can see the op rod track seems odd

 

The picture was pulled from a GB listing.

5.6 mil H&R receiver and H&R barrel.

 

The picture was pulled from a GB listing.

Definitely a pass one this one situation. Gotta a GB number?

 

 

Yes, an M1. Sorry if I wasn't clear on that

 

No trouble.

 

Visually it looks very possibly, especially if it goes through to the inside. I used to do NDI testing in Army aviation and I’d pass on that as a probable and not bother to pull out my field test kit.

 

The images are not of high enough resolution, but from my experience in having done work of this nature, I can state almost with absolute certainty that the defect noted is not a crack. I can also state with a near guarantee that the defect is the result of using a small die grinder to do a hand cleanup post machining. As is very often the case, these tools have a habit of wanting to get loose and skate across the workpiece, leaving a telltale sign. That's pretty much guaranteed what happened there.

Danny

 

Glad my 5.6mil HRA does not have that feature.

 

Looking at the pics closeup, I dont think its a crack either, but would want more info from the seller before bidding.

 

I looked at the image again, but based on some replies, I am wondering if I commented on the correct mark. My reply is about the weird mark that starts at the rear of the Op Rod shelf//track.

Danny

 

I also have a 5.6mil HRA, and there is no feature like that on mine!! -Lloyd 🍻

 

I agree it not a crack . If that’s the original stock. It has plenty of op rod handle and rear sight drum marks. I think rifle was in a pile stacked up and received scuffs and dings. I wouldn’t hesitate to buy if price was right. H&R made some of the nicest M1s

 

That is an odd place for a crack.

You need to do a dye penetrant test to confirm. You can buy a kit online.

 

If you can't tell by the naked eye there's a crack? The field test is fairly simple using a black light and penetrant dye, the kit usually consisted of spray cans of a cleaner, penetrating dye, and a powder. Although not definitive we'd usually green tag it and pass it on to intermediate maintenance for mag particle (MP) testing, I worked at AVIM level shop on Ft. Campbell and did the full MPI.

It's on GB, so unless you have inspection privileges and a generous return policy I might would pass on it based on pics and hunt for a better one... It' seems to be a buyer's market currently.

 

I am no expert but to my eye it's hard to tell. Might be a scratch. Seems like an odd place for metal fatigue.

 

Looks too precise for a crack to me.

 

Looks like a milling mark to me, possibly a scratch. I doubt very highly it’s a crack but I wouldn’t bid on it without a 3 day inspection period.

 

Looks a little too straight to be a crack but unless I could put hands on, I'd avoid it. If it is a crack, I'm thinking that receiver is done. Or at least the amount of work and money to fix it would be more than I'd want to invest. Too many M1's around to get into the weeds with this one.

 

Not sure about the rifle. Don't think it's a crack.
This is crack!

 

And that's exactly what you'd have to be using to buy that gun based on a photo.

 

Kind of looks like a big old scratch to me, especially in the second photo.