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Discussion Starter · #3 ·
bolt

Yeah, I already found out about the extractor when it broke on me. One look inside and it was obvious that it was cast. About the repro bolt, I've heard that some of these were cast. If this is true, how can you spot one that's cast, and how could you tell this was a repro with the info I gave? Just wondering, so I can learn to spot it myself. 8O
 

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I had a cast bolt on my pre-ban 14xxx and it had nothing where the heat treat code went, i.e. where yours has F00028. As I recall the drawing number ended in a "5" indicating it came stripped and below it was stamped "SA". That was it and it was cast and promply replaced for free by SA Inc as it was also recalled. Very quick turn-around time.

Bill
 

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Rather than start a new thread, I'll put this here. Just got a new bolt from Numrich Arms for the Poly. It came complete for $69 and looks to be very slightly used. Looks like a little grinding on the barrel will get it to lock all the way up. Right now it will only do about 30 percemt lock up before contacting the barrel at about six o'clock.

I was wondering if any ya'll could ID this critter. It say: 7790186

HRT A20

CDJ

It seems to be in very good condition.

Thanks for your help.

BigBlockk

Later.....
 

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Ralph R. Irwin said:
Looks like a little grinding on the barrel will get it to lock all the way up. Right now it will only do about 30 percemt lock up before contacting the barrel at about six o'clock.

I was wondering if any ya'll could ID this critter. It say: 7790186 HRT A20 CDJ

It seems to be in very good condition.

Thanks for your help.
BigBlockk
Later.....
Thanks Vet66

Ralph,
The bolt is a USGI H&R.

If you grind the barrel to make the bolt fit, you will ruin the barrel. :cry: The chrome lining will keep peeling once the seal is broken.

The receiver must be altered to make a USGI bolt work, which is better left to someone who knows how. The headspace must be set also so the rifle will be safe to shoot. Most Chinese barrels have very tight headspace so it probably won't chamber a round after you grind the barrel anyways.


I have done many bolt conversions on Polytechs for members here and nobody has had problems yet and their rifles shoot well.






 

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From M14 Rifle History and Development at www.imageseek.com/m1a regarding markings for USGI bolts:

Bolt Markings - A USGI bolt (and receiver) will have a dimple from a prick punch after proof round testing (USGI M14 drawings provided by Smith Enterprise). An inscribed "M" on a USGI bolt means it was magnafluxed (Ricca). USGI M14 bolts have additional stamps besides the part number and bolt manufacturer (Ricca). The other markings are lots of the heat treatment and steel (Ricca). Such an example can be found on a bolt marked 7790186 HRT A20 CDR (author's collection). These are in order: 1) part number 2) manufacturer code 3) heat lot number and 4) steel supplier code. If a manufacturer had only one steel supplier then just the heat treating lot was stamped on the bolt (Ricca). Other manufacturers consolidated their markings including both heat lot and steel maker (Ricca).
 

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From M14 Rifle History and Development at www.imageseek.com/m1a regarding the recall of Springfield Armory, Inc. bolts:

1987 Springfield Armory, Inc. Recall Notice - Note this recall was issued by Springfield Armory, Inc. in 1987. The author suggests reading through the following notice before calling Springfield Armory, Inc. After reading the recall notice and upon determining it applies to your rifle then contact the Customer Service Department at Springfield Armory, Inc. Politely discuss your situation with the Customer Service Representative. An e-mail reply from the Customer Service Department at Springfield Armory, Inc. in February, 2004 states that they still honor this recall if applicable to the part concerned.

and

M1A Bolts - Some M1A bolts manufactured by Springfield Armory, Inc. might not function reliably. If you have a Springfield Armory M1A bolt with any of the following markings, contact Springfield Armory, Inc. as outlined in steps A or B above for replacement. The bolts in question are marked as follows: No numerical or alphabetical characteristics on either top or back of bolt (completely unmarked). Any bolt with any numerical or alphabetical markings at all on the back of the bolt. Any bolt with the top marked "7790185" and with "SA RRR" centered below that number. Any bolt with the top marked "790185" and with "SA" centered below that number. Springfield Armory, Inc. regrets any inconvenience caused by the return of any firearm affected by this notice. Repairs will be completed in the shortest possible time, and all service, parts, and shipping costs will be the responsibility of Springfield Armory, Inc.

Sources: Guns & Ammo, December 1987; page 91 Guns & Ammo, March 1988; page 14 Shooting Times, January 1988; page 67 California Department of Justice Firearms Safety Note 88-1
 

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Discussion Starter · #13 ·
Hey Different, thanks for the info on the recall. Looks like mine is one that was recalled because it has a M stamped on the rear. I've never had any problems with it through about 3K rounds, but I guess I'll see what Springfield has to say. Thanks :lol:
 

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bkennedy be sure ot get some pics of that recalled bolt before you send it back. i'm sure some folks here would like to see them for refrence.
 
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