My SOCOM M305 hates aftermarket recoil spring guides...

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Originally Posted by geclark
- I couldn't get ANY of my 'enhanced' spring guides to work, NEA, Sadlak or others (so stuck with the stock one!)
Click to expand...

Interesting...I've had the same experience. With anything but the stock spring guide, the bolt/op rod stays jammed at the rearmost point of travel, although a firm tap will release it. It works okay out of the stock, but in the stock, with the trigger group in place, it locks back. That's with an NEA, a M14.ca and a Sadlac guide. I'd love to figure this one out, since the spring guide is the easiest upgrade possible.

I'm going to transfer this to the Main Battle Rifle forum. Any issues with upgrades or tuning tweaks are more likely to get an expert's attention there than in this thread.
 
I'm pretty sure you can run it just fine with a stock norinco spring and an aftermarket guide.
Several hundred rounds on my shorty and socom that way.
 
My understanding is that there are two sizes of springs, and spring guides:

American USGI size...

And Chinese Norinco size, which is a bit larger.

As such, if you take a US made spring guide and use it with Chinese springs, it may wobble a bit and not go totally straight. If you take a Canadian made spring guide, meant for Chinese Norinco spec M-14's, and put it on USGI springs, or Wolff or Brownells springs...it either won't fit at all, or will be especially tight and not function properly. AFAIK.

Now...if I understood your post, I'm thinking there might be another cause for the issue. I'd look carefully at the spring guide for anything that might hang up the spring. I'd put the spring and guide on the barrel/receiver, but outside of the stock and #### the action back and forth, try to identify if the metal might be binding at the oprod guide. I'd also look at the stock, along the side where the cocking handle is...is it binding on the stock? Is the oprod guide and barrel not indexed well?

Is it possible that the retaining pin hole, on the receiver, might be out of spec, meaning possibly in slightly the wrong location, causing binding? This might explain why this fails with three different companie's products...just sayin'.
 
I have a sj hardware spring guide with Wolff spring. Function properly. But mine is the regular m305 shorty. Not socom
 
The M14.ca Black Arrow ORSG (Op Rod Spring Guide) will work with both the larger springs and the original chinese springs. Check that your ORG (Op Rod Guide) is tight and true to vertical and that your rifle passes the tilt test (see bottom of page 12 and read page 13 of this document). See this page to correct a loose ORG. With a new ORSG you are truing the spring, with a flat, US GI ORSG and a loose ORG, you are allowing for the spring to remain sloppy during the action cycle. This is one possible, but likely reason your Op Rod is not binding as it has more room to move around with the original. Call for clarification if this is not clear.

m14.ca_black_arrow_spring_guide.jpg
 
Is it possible the Socom18s have springs closer to USGI spec?

I run all original Norc springs and have binding with all the ORGs I've tried (note - have not tried Black Arrow, it's sitting in a rig I don't want to take apart). I noticed that the Socom18 spring was longer (uncompressed) than the others I have, also a darker colour.
 
geclark said:
Is it possible the Socom18s have springs closer to USGI spec?

I run all original Norc springs and have binding with all the ORGs I've tried (note - have not tried Black Arrow, it's sitting in a rig I don't want to take apart). I noticed that the Socom18 spring was longer (uncompressed) than the others I have, also a darker colour.
Click to expand...

Anything's possible.
 
You have to change both the guide and the spring a the same time with the SA NM stuff, big improuvement of the bat... JP.
 
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