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Posted: 6/18/2014 9:37:19 AM EST
I need the measurements off just the action spring. I am building a homebrew ar folder. I'm hoping someone will do me a favor and save me frome buying the wrong springs...
Link Posted: 6/18/2014 9:42:38 AM EST
Why can't you just use a regular spring?
Link Posted: 6/18/2014 9:47:55 AM EST
I'm in the process of re-working the entire recoil system. it will use a smaller diameter coil, but same rate. most parts will be above the barrel. I'm hoping that it will just drop in...
Link Posted: 6/18/2014 10:41:06 AM EST
I love when people tinker and make stuff on their own, I'll be happy to help when I get home. Do you need the thickness of the spring? Or do you need me to disassemble the SCS and measure it's length? I haven't disassembled it before so not quite sure how it's done.
Link Posted: 6/18/2014 10:50:48 AM EST
Neat stuff.

Don't forget your going to be dealing with the same style but opposite direction off axis forces that cause carrier tilt and it's extra ware.
Link Posted: 6/18/2014 11:02:24 AM EST
alright, I'm glad someone wanted to help. I don't need the length or (quite...) the wire thickness. I need the outside diameter and inside diameter of the coil. Looking at the spring like a tube, how big across is the hole through the center. likewise, looking down center, how wide is it from side to side.
Link Posted: 6/18/2014 11:42:23 AM EST
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Originally Posted By Dannofree:
Neat stuff.

Don't forget your going to be dealing with the same style but opposite direction off axis forces that cause carrier tilt and it's extra ware.
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I'm not too worried about tilt. I basically chopped off the rear half of the carrier. I didn't really see the point after gutting the recoil components. especially if the stock is going to fold...
Link Posted: 6/18/2014 1:20:10 PM EST
[Last Edit: 6/18/2014 1:22:53 PM EST by Bretshooter]
What are you using as a carrier hard stop? Solid compression of the spring or a plug threaded into the extension hole (or inside whatever threads there, like the folding stock mount)?
Link Posted: 6/18/2014 1:22:30 PM EST
[Last Edit: 6/18/2014 1:24:00 PM EST by Bretshooter]
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Dannofree:
Neat stuff.

Don't forget your going to be dealing with the same style but opposite direction off axis forces that cause carrier tilt and it's extra ware.
View Quote


Not if the spring guide rod is rigidly attached to the carrier via a beefed up key. No tilt in ZM300 carriers.

Without that, there certain could be a tilt issue in the upper receiver
Link Posted: 6/18/2014 2:58:08 PM EST
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Originally Posted By Bretshooter:


Not if the spring guide rod is rigidly attached to the carrier via a beefed up key. No tilt in ZM300 carriers.

Without that, there certain could be a tilt issue in the upper receiver
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Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Bretshooter:
Originally Posted By Dannofree:
Neat stuff.

Don't forget your going to be dealing with the same style but opposite direction off axis forces that cause carrier tilt and it's extra ware.


Not if the spring guide rod is rigidly attached to the carrier via a beefed up key. No tilt in ZM300 carriers.

Without that, there certain could be a tilt issue in the upper receiver


I've never seen a ZM gun in person but what I'm doing is very similar.
Link Posted: 6/18/2014 3:02:44 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Bretshooter:
What are you using as a carrier hard stop? Solid compression of the spring or a plug threaded into the extension hole (or inside whatever threads there, like the folding stock mount)?
View Quote

I made an adapter of sorts for a Law Tactical hinge. It's aluminum with a nylon bumper.
Link Posted: 6/18/2014 3:50:03 PM EST
OD of the spring was.494. The OD of the spring guide was .370. I couldn't get an ID of the spring.

Link Posted: 6/18/2014 4:40:31 PM EST
thanks a ton! it looks like that's the way to go.
Link Posted: 6/18/2014 7:06:19 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Lennyo3034:
OD of the spring was.494. The OD of the spring guide was .370. I couldn't get an ID of the spring.

http://i1092.photobucket.com/albums/i408/lennyo3034/CC7A8D8F-B85C-4FD6-A3FD-2B838CEEA5FC-247-00000302F90E6BB7_zpsf60938f1.jpg
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Sure you can. How thick is the wire? Calculate the inner diameter.
Link Posted: 6/18/2014 7:23:40 PM EST
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Bretshooter:


Sure you can. How thick is the wire? Calculate the inner diameter.
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Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Bretshooter:
Originally Posted By Lennyo3034:
OD of the spring was.494. The OD of the spring guide was .370. I couldn't get an ID of the spring.

http://i1092.photobucket.com/albums/i408/lennyo3034/CC7A8D8F-B85C-4FD6-A3FD-2B838CEEA5FC-247-00000302F90E6BB7_zpsf60938f1.jpg


Sure you can. How thick is the wire? Calculate the inner diameter.


Oh yeah.

It's been a long day.
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