1950 SKS with spike bayonet

[newchi]

I can all but guarantee there's still boxes of trigger groups, receiver covers, sears  and anything else you can think of in some long forgotten corner of a store depot somewhere even today.

And some of the last sks's to go through the refurb process for storage probably were in the 60s or early 70s.

I am quite sure that both then and today there is a formula for parts to guns produced they followed.
Such as for every 1000 guns we need 200 spare bolts, 300 sears, 50 assembled trigger groups etc etc.

I have never found what part of the soviet warehousing system looked after boxes of parts and accessories but i will find it one day and post it here.

[jstin2]

Got my caliper out and here is what I measured. Measured from outside edge of pin hole to outside edge.
1949 - 50.72/50.98 mm
1950 - 51.08/51.37 mm
1957 - 51.33/51.44 mm
I did both sides due to slight differences.

[running-man]

Got my caliper out and here is what I measured. Measured from outside edge of pin hole to outside edge.
1949 - 50.72/50.98 mm
1950 - 51.08/51.37 mm
1957 - 51.33/51.44 mm
I did both sides due to slight differences.

Largest measurement to smallest (51.44 to 50.72) is .72mm or about 0.028".  That's just shy of 1/32nd of an inch.  I'd say those three measurements show the same nominal spacing in a mass produced item with match drilled holes & pins such as this.  Justin, you're going to have to kick out the boarder and get a good measurement for us!

[Loose}{Cannon]

What are we measuring? 

[running-man]

What are we measuring?

Diagonal straight line distance between the two pins that hold the FSB in place like this '49:


vs this '54:


Justin thought that his '49 had a shorter spacing but jstin2's measurements don't clearly show much discrepancy (if any at all).

[Loose}{Cannon]

Why would that be any different? 

I would expect slight differences though.

[running-man]

Hot damn Justin, take a look at this:

'49 I posted above to show as an example:


another '49 spike gun:


jstin's gun:


'52 early bayo lug:


'52 mid bayo lug:


'53 late bayo lug:


Look at the cleaning rod nubs, definitely a transition there.  The only equal length ones are found on '49's.    I wonder if the pin distance changed between equal length nubs and the later unequal ones?

[jstin2]

Out with the calipers. Measured from the top of sight hood to the bottom of cleaning rod nubs.
1949 - 53.42/53.40 mm
1950 - 53.45/55.63 mm
1957 - 54.15/56.04 mm

[running-man]

jstin2, does your '49 have the two equal length nubs like the '49 in my example above?

[jstin2]

My measurements are in the post above yours. Yes my 49 are equal. 53.42 mm- 53.40 mm.

[newchi]

jstin2, does your '49 have the two equal length nubs like the '49 in my example above?

Nope

[jstin2]

I was asked about my 49 by r-m not my 50. I posted my measurements of my 49,50 and 57. The picture you posted is from my 50.

[newchi]

I was asked about my 49 by r-m not my 50. I posted my measurements of my 49,50 and 57. The picture you posted is from my 50.

doh, thats what happens when you have too many tabs open

[Loose}{Cannon]

I was asked about my 49 by r-m not my 50. I posted my measurements of my 49,50 and 57. The picture you posted is from my 50.

What makes you think its a 50?   

[Loose}{Cannon]

jstin2, does your '49 have the two equal length nubs like the '49 in my example above?

Nope

Gotta love refurbs...  Wonder which depot installed it last. 

[running-man]

My measurements are in the post above yours. Yes my 49 are equal. 53.42 mm- 53.40 mm.

Ahh, duh I totally missed that this is what you were measuring!  Very neat. 

[pcke2000]

To RM,

Do all 1949s have the two equal length nubs? or do you think they are supposed to have the two equal length nubs? Thanks.

[running-man]

Gotta love refurbs...  Wonder which depot installed it last.

Gotta call it something.  The cover says '50, the features say '49/'50.  It's one of those two as it sure as heck isn't a '51+ with those features. I'm leaning more and more towards '50 to be honest.  If the cleaning rod retainer nubs were equal length, then I'd lean more towards '49, but that's not the case.  I don't think the FSBs got replaced much during any refurb, the '49-'52 early bayo lugs are simply never seen on later guns and the late lugs are never seen on early guns.

Like you've said numerous times before, we need another example of a spike '50, but nothing feature-wise is completely disqualifying on the gun.  It could easily be a '50 (or a '49.) 

[running-man]

To RM,

Do all 1949s have the two equal length nubs? or do you think they are supposed to have the two equal length nubs? Thanks.

No there are photos of '49 spike bayos with unequal nubs in my database. They are refurbs of course, but it seems interesting that this feature provides a pretty clean delineation as I can find none occuring in '50 or beyond and I looked through every single '49-'53 gun in the database! 

[Loose}{Cannon]

That settles it.  Cleaning rod retaining nubs change Jan 1st 1950.... Based off of zero original guns of course.