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December 18th, 2009, 08:30 PM
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#31 | | Platoon Sergeant
Join Date: Feb 2007 Location: Columbia, SC
Posts: 324
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Mine is marked:
7790186
TRW ZB
I assume it is real, with no recall.
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February 17th, 2010, 03:10 PM
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#32 | | Rifleman
Join Date: Oct 2008 Location: Bay Area Kalifornia/Houston TX
Posts: 54
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After purchasing and reading Scott Duff's book I have done a survey of my two Springfield rifles for GI parts. My NM gun, vintage 1994 and then built into a NM gun by Springfield in 1998 is pretty much all GI (Actually all Winchester besides the barrel but the original barrel was also Winchester).
However my 1995 vintage SOCOM is mostly commercial parts. What has me concerned is that the Bolt is an "A" prefix indicating it is a cast bolt (but not on the recall list). With around 500 rounds through the rifle, it hasn't given me any trouble, but is this something I need to be concerned about? Obviously I would prefer a cast or barstock bolt, but will Springfield swap it out for me or do I just have to wait until it breaks?
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February 20th, 2010, 04:47 PM
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#33 |
Join Date: Jun 2009 Location: NY
Posts: 82
| my bolt ls?
the bolt on my lrb is
marked
7790186
66118-EE
anyone know who made it and what the (EE) stands for?
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February 20th, 2010, 04:51 PM
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#34 | | Lifer
Join Date: Jul 2003 Location: Las Vegas, NV, USA
Posts: 7,812
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Winchester was the manufacturer. EE was the material lot code.
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March 6th, 2010, 08:08 AM
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#35 | | Old Salt
Join Date: Nov 2008 Location: tennessee
Posts: 1,825
|  please id #
7790186SA
F000171
thanks
NRA LIFE MEMBER
U.S. ARMY VET.
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March 6th, 2010, 08:32 AM
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#36 | | Lifer
Join Date: Jul 2003 Location: Las Vegas, NV, USA
Posts: 7,812
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Commerical Springfield Armory, Inc. manufacture. It's a forged bolt.
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March 6th, 2010, 10:36 AM
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#37 | | Old Salt
Join Date: Nov 2008 Location: tennessee
Posts: 1,825
| Thanks
THANKS DIFFERENT
thank you sir. just bought # 2 here last night from px so wanted to check bolt #.
NRA LIFE MEMBER
U.S.ARMY VET.
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March 7th, 2010, 07:38 AM
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#38 |
Join Date: Jul 2003 Location: Huffman,TX
Posts: 348
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Any update on who made the bolt in question ?
Looks Chinese , but did we get confirmation ?
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March 7th, 2010, 05:23 PM
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#39 | | Fire Team Leader
Join Date: Sep 2007 Location: Arizona
Posts: 205
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Howdy-
Here's one I'd like help with, if anyone knows.
bolt marked 7790185 ( yes, looked long and hard with direct lighting and magnifying glass- the "5" looks different than the 6's in the second line, top is clearly flat,upwright has no curve to it, front is open )
66118
X
bolt is gray phos. finish, has the dimple.
Thanks in advance for any help!
Best,
cowboy33713
Last edited by cowboy33713; March 7th, 2010 at 05:41 PM.
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March 7th, 2010, 05:38 PM
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#40 | | Lifer
Join Date: Jul 2003 Location: Las Vegas, NV, USA
Posts: 7,812
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Quote:
Originally Posted by cowboy33713  Howdy-
Here's one I'd like help with, if anyone knows.
bolt marked 7790185
66118
X
bolt is gray phos. finish, has the dimple. | Early USGI Winchester
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March 7th, 2010, 08:38 PM
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#41 | | Fire Team Leader
Join Date: Sep 2007 Location: Arizona
Posts: 205
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Thanks, Different! Always pays to consult those in the know.
Best,
cowboy33713
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March 13th, 2010, 07:19 PM
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#42 | | Platoon Commander
Join Date: Nov 2008 Location: Missouri
Posts: 403
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Maybe a stupid qustion, is there any advantage over one USGI bolt manufacturer to another? For example TRW vs. Springfield.
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March 14th, 2010, 03:11 AM
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#43 | | Lifer
Join Date: Jul 2003 Location: Las Vegas, NV, USA
Posts: 7,812
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TRW bolts tend to be a little longer. That will shorten the headspace a few thousandths (~ 0.004 " or less). If you're installing a chromium plated USGI barrel on a commercial receiver, it may be what is needed to get the headspace desired.
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November 5th, 2011, 01:00 PM
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#44 | | Rifleman
Join Date: Oct 2003 Location: KALISOCIALISTFORNIA
Posts: 40
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Thanks for posting this info Different!
Semper-Fi!
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January 24th, 2012, 11:54 AM
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#45 | | Designated Marksman
Join Date: Jul 2011 Location: Las Vegas, NV
Posts: 582
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Is there any preferred TRW bolt? I have 3 TRW bolts and 1 H&R.
One of TRW bolts is marked...
7790186
TRW ZD
the other two are...
7790186
TRW ZG
the H&R bolt is marked...
7790185 HRT
AO3
would any of these be preferred over the other? thanks for any help.
Casey
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