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This is a discussion on Rebound Springs within the Ruger Rimfires forums, part of the Pistol & Revolver Forum category; I just got an ad from TandemKross, $9.99 for a 5 pack of Mark IV rebound springs. Is that a good price? Will I ever ...


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Old March 22nd, 2017, 12:06 PM   #1
 
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Rebound Springs

I just got an ad from TandemKross, $9.99 for a 5 pack of Mark IV rebound springs.

Is that a good price? Will I ever need 5 springs? How often should they be replaced?




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Old March 23rd, 2017, 03:19 AM   #2
 
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Yes it's a good price; the entire post-zombie society of the Walking Dead wouldn't need 5 springs; and probably not in your lifetime unless you blow through about $30k in ammo.

If you just bought a Mark IV, the chances of you needing to replace that spring due to wear and tear in the next 20 yrs if you shot weekly are low. Ignore the ad, go about your day. That spring will be out there someday if you need it. All in my humble opinion as they say.
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Old March 23rd, 2017, 03:41 AM   #3
 
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Quote:
Originally Posted by irishbob View Post
Yes it's a good price; the entire post-zombie society of the Walking Dead wouldn't need 5 springs; and probably not in your lifetime unless you blow through about $30k in ammo.

If you just bought a Mark IV, the chances of you needing to replace that spring due to wear and tear in the next 20 yrs if you shot weekly are low. Ignore the ad, go about your day. That spring will be out there someday if you need it. All in my humble opinion as they say.
Thanks, I think I will pass.

I'm 69 now. In another 20 years I'll be lucky to remember where I put the gun, let alone the springs.
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Old March 23rd, 2017, 08:59 AM   #4
 
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I have to disagree with Irishbob's assessment. The rebound spring, it's support, and the extractor are all consumables. I have 2 Mark pistols, and the rebound spring has broken in both.

The first pistol (bought new) was my fault for not cleaning the firing pin channel, or it's components for 5k rounds. I was testing how long you could neglect a gun (cleaning only the chamber and bore) before a failure resulted. Crud in the spring caused it to break.

The second pistol (bought used) was not my fault. Based on how dirty it was when I bought it though, the spring may have been weakened by crud to the point that failure was imminent. I put around 8k on the (regularly cleaned) spring before it failed.

The support and extractor both gall gradually (but continuously). They need a little file work periodically to keep them smooth and moving freely. The longest I have had an extractor last (so far) is 15k rounds.

If you only have one pistol, and you clean the spring regularly, a single spare may be all you will need. I wish the 5-pack included a few replacement supports as well. I currently need to replace both supports and one of the springs. For $10, I may just get the 5-pack and lump 4 supports into the order. I hope TK has supports. I haven't checked yet.
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Old March 25th, 2017, 09:01 PM   #5
 
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I cleaned all 9 of my Mk. pistols and my Mk.II competition target model had a broken spring, was surprised because it was shooting perfect. Replaced it with a Mk. III spring that i had in spare parts and it seems to work OK and they all seemed to look the same. Anyone know if all the Mk. pistol springs are interchangeable? Numrich Arms has about 4 or 5 different ones, but if the TK 5 pack will fit all of the, i would get a pack just to have on hand.
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Old March 25th, 2017, 11:18 PM   #6
 
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Yes, all the Mk. pistol (& 22/45) rebound springs are the same part.
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