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BTL BRN
10-11-13, 14:51
I recently purchased a PTR-91 GI and I will admit to being new the HK family of weapons. I have taken it to the range only once and ran 60 rounds of 150 grain American Eagle FMJ through it, I had absolutely no malfunctions or stoppages and as far as I can tell the weapon performed as it should - ejection was rather "vigorous!" :p

I noticed upon receipt of the rifle that there was oil in the fluting along the sides of the receiver, and after cleaning I saw it again; note not a LOT of oil but some. This made me curious and I took a flashlight and shone it through the magwell and noticed that I could observe a small amount of light through the receiver - probably less than a 1/16 of an inch wide. Below you can see a picture, it is clearly not a crack, but an area where the weld seems to have a void.

I DID contact PTR, and they issued a UPS return label, VERY promptly; followed up by a personal phone call. I give great credit to their customer service department.

http://i40.tinypic.com/t02dc3.jpg

I am soliciting your advice here:

I don't want to send the weapon in for repair (who like to be without for awhile?!) unnecessarily. It appears to be a relatively low-stress area; and could be quite common. It is NOT a crack in the receiver, I suspect it is just a void in the weld.

Thank you for your help. :thank_you2:
Heavy Metal
10-11-13, 15:29
Take a picture of the other side please.
BTL BRN
10-11-13, 15:38
Take a picture of the other side please.

I assume that you mean the inside of the receiver? :confused:
Heavy Metal
10-11-13, 16:14
No, I mean the outside where you placed the light against.
BTL BRN
10-11-13, 18:29
OK, here are a few more -

http://i39.tinypic.com/spu3bm.jpg

http://i44.tinypic.com/2ns10rt.jpg

http://i39.tinypic.com/xqgylx.jpg


It appears to me perusing the net, that these small voids are somewhat common? What seems to matter much more is that the trunion is in good shape (a problem of PTRs quite awhile ago).

See for example this picture from Arizona Response Systems -

http://i42.tinypic.com/30cxija.jpg

I can clearly see a gap around the bend in the receiver.

I just want to make sure that the gun isn't battering itself into a shorter life span.
SteyrAUG
10-12-13, 00:16
OK, first things first. It's a channel, not a flute. The flutes are what is inside the chamber and what allows the round to float out.

Those channels are also where the para stock arms slide. You probably already knew that.

Onto the important part, the welds are simply welds, they aren't necessarily water tight. While I don't think I've ever encountered them on factory HK guns I've seen plenty of exposed corners on HK clones.

I recall some Vector guns that had gaps almost large enough to fit a pencil through them. What you have isn't anything that bad and I don't think it will have anything to do with life expectancy of the firearm. It just isn't an area that carries the main stress loads.

The area where the trunnion is pinned and welded and the welds at the rear of the receiver where the double stock pins attach, which take the impact of the recoiling bolt, are the main areas you want to watch for stress.

I've seen some cheap clones (and PTRs aren't what I mean here) that had already started stretching and splitting at the rear of the receiver after only a few years.
Valkyrie19
10-29-13, 23:39
Wow. This is some sloppy welding. Compare the one on your rifle to mine on gunbroker:

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=373458518

Do you know the date of manufacture?

Valkyrie
SteyrAUG
10-30-13, 15:59
Wow. This is some sloppy welding. Compare the one on your rifle to mine on gunbroker:

http://www.gunbroker.com/Auction/ViewItem.aspx?Item=373458518

Do you know the date of manufacture?

Valkyrie


Ahem...


From your Gunbroker listing:

The PTR-91 GI is one of the best made Heckler & Koch G-3 / HK-91 contract rifles on the market and is exceptionally accurate. This Rifle s 2012 production with the correct chamber fluting.

The PTR is NOT a contract rifle. Even though they purchased the tooling from FMP they are still not a HK contract factory and they don't meet the required specifications to be a HK contract rifle.

They are the best US made 91 copy, but that is very different from being a contract rifle.
SPQR476
10-30-13, 16:10
PTR turned my GI with a cracked trunnion around in 10 days with a new trunnion and a refinish. Touching up that weld and a refinish should be quick.

You might as well get it fixed. Probably won't hurt anything at all, but it's probably gonna bug you.
Valkyrie19
10-30-13, 18:57
Please pardon my hyperbole. :)



Ahem...



The PTR is NOT a contract rifle. Even though they purchased the tooling from FMP they are still not a HK contract factory and they don't meet the required specifications to be a HK contract rifle.

They are the best US made 91 copy, but that is very different from being a contract rifle.
HKGuns
10-30-13, 21:11
I'd pay particular attention to SteyrAUG if I were in your shoes on this topic OP.
SteyrAUG
10-31-13, 22:34
Please pardon my hyperbole. :)

No problem. Just wanted to make sure you knew what was what. I've seen LOTS worse on Gunbroker.
SteyrAUG
10-31-13, 22:38
PTR turned my GI with a cracked trunnion around in 10 days with a new trunnion and a refinish. Touching up that weld and a refinish should be quick.

You might as well get it fixed. Probably won't hurt anything at all, but it's probably gonna bug you.

Honestly, that's probably very good advice.

I've had a few guns where there technically wasn't anything wrong with them but something about it bothered me (usually something aesthetic) and it prevented me from enjoying the gun to the point I never shot it. Most I ended up selling.

When you buy a quality rifle, or what you expect to be a quality rifle, and you encounter things you deem sloppy, below expectations or whatever it really can ruin the entire experience.