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February 16th, 2012, 05:14 PM
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#1 | | Rifleman
Join Date: Jul 2010 Location: Midwest
Posts: 73
| 2 piece op rod spring guide. Toss it?
Picked up an old "NM" op rod spring guide from someone here, way back, sight unseen. The early version with mag catch welded on. It will not be used but what is the danger of catastrophic failure if/when it would let loose. What's the worst that could happen? Were these early attempts at what they have now evolved in to, anyone with experience with these? Thanks, CTK
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February 16th, 2012, 05:18 PM
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#2 | | Platoon Commander
Join Date: Jul 2010 Location: Tennessee
Posts: 434
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i run a round spring guide on my LRB and have had no problems.
Worse thing that i could see is the mag would disengage.
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February 16th, 2012, 06:32 PM
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#3 | | Lifer
Join Date: Feb 2007 Location: NorCal
Posts: 2,119
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Depends on who made it and how well. There are a bunch of cheap ones out there, Sarco used to sell them among others.
I used to have a bad one, the tab was crooked and it was too long and it made it a PITA to field strip. Now replaced by Sadlak and won't go back. Hey, that has a ring to it. 
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February 16th, 2012, 07:05 PM
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#4 | | Rifleman
Join Date: Jul 2010 Location: Midwest
Posts: 73
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It's been installed, good fit, cycles smoothly, good mag lock up. Just curious what is worse case scenario if breakage occurred under pressure of live fire. Trying to dissect in my mind, but I'm no engineer.
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February 16th, 2012, 08:09 PM
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#5 | | Scout Sniper
Join Date: Nov 2009 Location: under a rock IN CENTRAL MASS.
Posts: 820
| Quote:
Originally Posted by cheepertokeeper  It's been installed, good fit, cycles smoothly, good mag lock up. Just curious what is worse case scenario if breakage occurred under pressure of live fire. Trying to dissect in my mind, but I'm no engineer. | the amtu style type are junk. noses are annealed and will wear out quickley.
they are silver solderd together and subject to joint failure depending on the quality of workmanship.
later models had a spring pin through both parts as a safety measure.
what can happen and has, is joint failure, the rod fell out, don't ask me how, and jammed against the side of the reciever
bending the oprod on the next round fired. this one did not have the spring pin installed.
get a sadlak
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February 16th, 2012, 08:26 PM
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#6 | | Rifleman
Join Date: Jul 2010 Location: Midwest
Posts: 73
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Seems Sadlaks been BO'd for some time. Just ordered two Badger Ordnance, hope there up to snuff, didn't really do my homework. Seems like such a no brainer to me, why do they even bother with the standard design any longer, can't cost all that much more to produce/supply NM spring guides with every build. Of course it would eat into the aftermarket industry. Like buying a bone stock Harley, they know you'll be back.
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February 17th, 2012, 03:11 AM
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#7 | | Lifer
Join Date: Nov 2003 Location: So. Cal
Posts: 4,810
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Standard flat bar ones are stamped, much faster to make.
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February 17th, 2012, 08:58 AM
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#8 | | Lifer
Join Date: Nov 2008 Location: Louisiana
Posts: 2,173
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Quote:
Originally Posted by cheepertokeeper Picked up an old "NM" op rod spring guide from someone here, way back, sight unseen. The early version with mag catch welded on. It will not be used but what is the danger of catastrophic failure if/when it would let loose. What's the worst that could happen? Were these early attempts at what they have now evolved in to, anyone with experience with these? Thanks, CTK |
CTK, are you talking about the earlier Brookfield NM Spring Guides? Post a pic, to help identify. BTW: I've got a Brookfield installed in my loaded SAI(1996), and it looks to be tig welded in. I don't think it'll ever break. dozier
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February 17th, 2012, 09:53 AM
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#9 | | MGySgt USMC (ret)
Join Date: Nov 2008 Location: Virginia
Posts: 4,545
| Quote:
Originally Posted by cheepertokeeper Picked up an old "NM" op rod spring guide from someone here, way back, sight unseen. The early version with mag catch welded on. It will not be used but what is the danger of catastrophic failure if/when it would let loose. What's the worst that could happen? Were these early attempts at what they have now evolved in to, anyone with experience with these? Thanks, CTK | You may enjoy reading this: Old and New NM M14 Op Rod Spring guides
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February 17th, 2012, 10:02 AM
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#10 | | Scout Sniper
Join Date: Nov 2009 Location: under a rock IN CENTRAL MASS.
Posts: 820
| Quote:
Originally Posted by dozier ctk, are you talking about the earlier brookfield nm spring guides? Post a pic, to help identify. Btw: I've got a brookfield installed in my loaded sai(1996), and it looks to be tig welded in. I don't think it'll ever break. Dozier | your right,
over 6 thousand were made with no reported breakage.
They were tig welded by machine.
They were destruct tested with no failures of the welds.
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February 18th, 2012, 05:57 AM
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#11 | | Grunt
Join Date: Jan 2010 Location: Massachusetts
Posts: 114
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I have a BPT op rod spring guide in my rifle. The only problem I have had with it is I think I paid to much for it. Then again, it's not like you can order one.
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February 18th, 2012, 07:23 PM
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#12 | | Lifer
Join Date: Dec 2003 Location: Upstate NY
Posts: 2,768
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The one on my supermatch is soldered. I had to file it back to shape after 8k rds. The latch part is a little soft.
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February 19th, 2012, 07:31 AM
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#13 | | Rifleman
Join Date: Jul 2010 Location: Midwest
Posts: 73
| Quote:
Originally Posted by SmokyBaer i run a round spring guide on my LRB and have had no problems.
Worse thing that i could see is the mag would disengage. | That is what I thought. Then someone told me to get that thing off there, "It's a disaster waiting to happen" Seller told me manufacturer, cannot recall, was even newbier than now, hadn't even heard of Brookfield back then. Lousy pic may not show latch is dovetailed into body. Latch shows no visible wear, but cannot see evidence of solder or welding. It seems mighty solid, but how it is joined, I don't know. Thanks.
Fascinating link, thanks Gus.
Last edited by cheepertokeeper; February 19th, 2012 at 07:43 AM.
Reason: update
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February 19th, 2012, 09:16 AM
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#14 | | Lifer
Join Date: Nov 2008 Location: Louisiana
Posts: 2,173
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Quote:
Originally Posted by cheepertokeeper That is what I thought. Then someone told me to get that thing off there, "It's a disaster waiting to happen" Seller told me manufacturer, cannot recall, was even newbier than now, hadn't even heard of Brookfield back then. Lousy pic may not show latch is dovetailed into body. Latch shows no visible wear, but cannot see evidence of solder or welding. It seems mighty solid, but how it is joined, I don't know. Thanks.
Fascinating link, thanks Gus. |
Chrome plated, mag latch dovetailed in???? That's a new one on me. Try the parallel test as Gus describes, if it passes give it a try, and check for wear/looseness of the latch. dozier
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February 19th, 2012, 11:06 AM
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#15 | | Scout Sniper
Join Date: Nov 2009 Location: under a rock IN CENTRAL MASS.
Posts: 820
| Quote:
Originally Posted by cheepertokeeper that is what i thought. Then someone told me to get that thing off there, "it's a disaster waiting to happen" seller told me manufacturer, cannot recall, was even newbier than now, hadn't even heard of brookfield back then. Lousy pic may not show latch is dovetailed into body. Latch shows no visible wear, but cannot see evidence of solder or welding. It seems mighty solid, but how it is joined, i don't know. Thanks.
Fascinating link, thanks gus. | It is not a BROOKFIELD or a SADLAK guide in that picture. It appears to be one of the silver soldered and chrome plated junk ones. Not a dovetail slot just a straight cut.
Get a Sadlak and be sure of the quality.
Both BROOKFIELD and SADLAK are proud enough to put their names on them.
Last edited by SOCOM42; February 19th, 2012 at 01:09 PM.
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