CMP $100 Barreled receiver

[Joel in CT]

My barreled reciever arrived this afternoon. Order was placed 2/9/09. What I received is a Springfield Ser# 35044 (WOW) no 7th round fix. Just some surface rust that cleaned nice. The barrel is blued and the only marking on it is the number 57 on top the chamber. TE 7, muzzle passes the bullet test. Don't know where I'll find early parts for this receiver without going broke. I would like any help on IDing the barrel.

Information

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[Brett]

No 7th round repair?! That's even more of a wow then the SN. I thought all those went to auction...

[A. F Medic]

Ignorance here. What is a seventh round repair?

[Dan Shapiro]

Early rifles had a nick in the rib guide because there was no specification on how far the drill was to penetrate the front of the receiver when drilling the hole for the barrel. Look down into the receiver from above and check the 1st two ribs on either side of the receiver, just past the chamber. The ribs should be straight up and square. If they were nicked, there will be a slight bevel to them at the top. Also look for a slight discoloration which would indicate the ribs had metal added to them and were then recut. These rifles are found in the <50000 serial number range.

[RCS]

I am sure all revision 1 receivers (up to 49797 so far) had the low guide ribs, most were corrected. Gas trap rifles with revision 2 receivers had production high guide ribs. Some Winchesters from 1941, have also been found with low guide ribs (100,075 is an early example)

[erikor]

Just to finish the thought on the seventh-round stoppage, the nick in that rib was found to cause misfeeding on the seventh round of the clip ("seventh-round stoppage"). Hence the need to fill in the nick and modify the spec for manufacturing of future receivers.

[Bill Hollinger]

Photos Man!

[RCS]

besides the low guide ribs there is another unique feature that is only found on receivers in this serial number range

[Mr Hanky]

RCS,

What would that be?

[islandhopper]

The first photo shows the uncorrected guide rib (notice how the rib just behind - to the right - of the arm of the op rod catch is beveled down istead of a 90 degree cut from the bolt lug channel) that caused the 7th round stoppage problem. The second photo shows the receiver serial number, that is within the serial number range that this issue was a problem.