[milsurpcollector87]

Ordered this 922(r) sear for my SP5 SBR. In addition to the 'USA' marking, it also has what appears to be an 'Hk' in a circle. Thoughts on what this marking is?

 

[EasyVeeZee]

Could be a parts ID marking, telling the warehouse monkeys what it's for.

 

[Mike748]

HKParts marking?

 

[milsurpcollector87]

This was sold as a 922(r) part and marked USA, so I was trying to determine if it was an authentic HK proof mark or an HKParts.net marking. A second example in my parts supply shows the USA marking but not the circled 'Hk' pictured above.

 

[German]

an authentic HK proof mark

Neither design nor method match anything HK Germany puts on gun parts today.

 

[milsurpcollector87]

Appreciate the confirmation very much, @German!

 

[Sextus]

This is what popped into my head when I read the title.

 

[bauerdb]

It is a USA made part. Who cares? Maybe send it for metallurgic analysis?

 

[milsurpcollector87]

@bauerdb
Curiosity, more than anything else. You know, there are plenty of nerds like me around here who enjoy the small details. 🙂

 

[catplusneo2]

I have seen the HK circle marking on a G3 hammer. Some old parts are stamped with that.

 

[milsurpcollector87]

Well, that sheds some interesting light on the topic. Looks like this came up two years ago...

HK Internal Parts Markings

I have a G3 ejector lever marked with the letters “HK” inside a circle and a G3 hammer with an “X” marked on the side. Would theses marks indicate original HK parts or have any other meanings. Interested in learning more about markings. Thanks

www.hkpro.com

 

[corporal jj]

I have seen the HK circle mark Some old parts are stamped with that.

Yes that is an old mark. I have an HK 300 made in 1975 that has that mark on it…

 

[catplusneo2]

Yes that is an old mark. I have an HK 300 made in 1975 that has that mark on it… View attachment 334190

Great! Thanks for the pic. Was afraid I was senile to remember it correctly.

 

[corporal jj]

Great! Thanks for the pic. Was afraid I was senile to remember it correctly.

Specifically, it is stamped on the action just ahead of the serial number on the portside. there are no date codes on these old 300s they have to be dated by their serial number. I always thought that stamp represented something in the way of date coding but I’ve never found any evidence to support that.
Serial no. on this HK300 is 6xxx.

 

[catplusneo2]

Specifically, it is stamped on the action just ahead of the serial number on the portside. there are no date codes on these old 300s they have to be dated by their serial number. I always thought that stamp represented something in the way of date coding but I’ve never found any evidence to support that.
Serial no. on this HK300 is 6xxx.

Or it simply it's been proved by the HK proof house? Like it's early proof mark?

 

[corporal jj]

Or it simply it's been proved by the HK proof house? Like it's early proof mark?

I considered that too. I’ve just never gotten any more information on it from anywhere. If it was a proof mark I would think it would be on the barrel and not on the action or on both.

 

[catplusneo2]

I considered that too. I’ve just never gotten any more information on it from anywhere. If it was a proof mark I would think it would be on the barrel and not on the action or on both.

Then the last guess is it's just a proof that it's a HK genuine part lol. But then why it is not on every part of the gun...

 

[German]

Then the last guess is it's just a proof that it's a HK genuine part

Have a look at the mark in the provided pictures and the picture above.

The HK ones are rolled(?) and clearly discernible, the one on the part in question seems to be unevenly applied by a hammer and punch.

Not sure if that's the same.

 

[corporal jj]

Have a look at the mark in the provided pictures and the picture above.

The HK ones are rolled(?) and clearly discernible, the one on the part in question seems to be unevenly applied by a hammer and punch.

Not sure if that's the same.

Yes those are rolled marks that are actually on the weapons …on the part it is hand punched but it is conspicuously the same shape , size and everything and it would be very difficult to roll mark a part like that. I’m not so much interested in how the part was actually marked but interested in the mark itself appearing on the older HK’s up to 40+ years old and now finding it on these contemporary parts it’s just an interesting mystery…

 

[ghilliebear2000]

Seen it many times HK marking someone laser engraved over the part