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P320/M17 recoil spring/guide rod Login/Join 
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Folks, I have a rusty recoil spring.
Anyone know how to replace it?

Brownells has it:
https://www.brownells.com/hand...ring-prod108020.aspx

Can the recoild guide rod be disassembled?
https://www.brownells.com/hand...uide-prod108028.aspx
 
Posts: 35 | Registered: October 25, 2009Reply With QuoteReport This Post
Freethinker
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The first Brownells link is to the outer spring for the Compact and Subcompact models, not the M17 and full size.

In any event, the 9mm full size P320 recoil spring is color coded with orange paint that can look like rust. I suppose it’s possible you have a rusty spring, but it’s unlikely unless you’ve been dunking the assembly in seawater and not rinsing it afterwards.

If you want to change systems, though, I recommend the Grayguns separate rod and 1911 type recoil spring that will avoid the supply complications of the factory recoil spring assembly.
And there’s no paint on the springs that can be mistaken for rust, mold, or grape jelly. Wink




“To argue with a person who has renounced the use of reason is like administering medicine to the dead.”
— Thomas Paine
 
Posts: 43552 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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Thanks for this recommendation.
 
Posts: 35 | Registered: October 25, 2009Reply With QuoteReport This Post
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The grayguns fat guide rod allows you to spring the pistol for your load: if you choose to shoot light loads, you can run a light recoil spring. Some say that the P320 full size is oversprung, and that it tends to lead to front sight dip when the slide returns, after a shot. A lighter spring may be preferred. Grayguns ships their rods with a 15 round spring.

I'm running my full size P320's with 12 lb springs presently, and I know some who go down to 9-10 lbs. 12-14 seemed to work best for me, using relatively light 147 grain rounds.

I think the pistol cycles more smoothly with the fat guide rod, and it does mean that for future spring changes or adjustments, you can replace the spring for less cost than a complete assembly. The fat guide rod assembly uses 1911 springs.
 
Posts: 5712 | Registered: September 13, 2006Reply With QuoteReport This Post
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Thanks for the suggestions folks.
I'll have to keep it stock as this is an M17 surplus. It's now soaking in kroil.
 
Posts: 35 | Registered: October 25, 2009Reply With QuoteReport This Post
Freethinker
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quote:
Originally posted by ybrik:
I'll have to keep it stock as this is an M17 surplus.


Ah. That might explain the rust. I hope you weren’t offended by my suggestion that it could be paint rather than rust, but it’s hard to know about some things based on short Internet posts.

Good luck with your project.




“To argue with a person who has renounced the use of reason is like administering medicine to the dead.”
— Thomas Paine
 
Posts: 43552 | Location: 10,150 Feet Above Sea Level in Colorado | Registered: April 04, 2002Reply With QuoteReport This Post
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quote:
Originally posted by sigfreund:
quote:
Originally posted by ybrik:
I'll have to keep it stock as this is an M17 surplus.


Ah. That might explain the rust. I hope you weren’t offended by my suggestion that it could be paint rather than rust, but it’s hard to know about some things based on short Internet posts.

Good luck with your project.


Not really sigfreund.
This is my first surplus item. Had few trips at the range last year, cleaning every trips and put it on safe. After 3-4 months in the safe, I was surprised small rust spots developed at the back of sear housing and trigger. Was really disappointed as all my other pistols didn't have it knowing that they are all in the same conditions inside the safe.
Upon closer inspection at the other parts, recoil spring and striker assembly spring had them too but not too apparent as on the sear housing.

I detail stripped the FCU last night and was surprised to see a safety lever spring even if this is already using the new "captive" safety lever.
 
Posts: 35 | Registered: October 25, 2009Reply With QuoteReport This Post
Doveryai,
no proveryai.
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I've got to check my FCU now, thanks guys.


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Posts: 3661 | Location: Cop Land | Registered: September 01, 2005Reply With QuoteReport This Post
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You may be able to see this safety lever spring as its 2 ends are visible from the FCU.
Something that caught my attention as sig guy's M17 disassembly in YT didn't have it.
 
Posts: 35 | Registered: October 25, 2009Reply With QuoteReport This Post
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