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Recoil Spring Question

Posted: Wed Oct 31, 2018 9:10 am
by NorincoKid
Hey guys. I'll admit to not being super knowledgeable about the AR stuff. But I got a few parts in trade, and figure I had a stripped lower in the safe maybe I'll put together.

In the lot of parts I got, a incomplete LPK, some monstrous quad rail thing, and a buffer & spring.

It's been awhile since I've had an AR on hand, but this looks very, very long compared to what I remember having on mine.

The Spring itself measures out to 17" , looks like 42 coils. I thought I remembered the recoil on my carbine being 10-12" or so? The buffer itself is is just under 5" long, maybe 4 7/8" ish?

Are these .308 parts? They seem to be considerably different than any standard parts I've had before. Any input is appreciated, thanks.

NK

Re: Recoil Spring Question

Posted: Wed Oct 31, 2018 11:16 am
by rentprop1
from a foggy memory, hope this helps

regular AR-15
buffer spring approx 12.75 inch, number of coils doesn't matter and will vary from mauf to manuf
a rifle buffer tube ( or receiver extension ) measures about 10 inches
a rifle length buffer measuers about 6 in

carbine length 11.25
buffer tube = 7
buffer = 3.25

for 308

all I have here is a carbine spring and it measures about 11 in

Re: Recoil Spring Question

Posted: Wed Oct 31, 2018 12:50 pm
by NorincoKid
Thanks.

Yeah then I'm not sure what this is from. Its 17" long, maybe its just a stretched out and/or hammered spring?

Re: Recoil Spring Question

Posted: Wed Oct 31, 2018 3:26 pm
by flcracker
Maybe a mag spring from a shotgun? :?:

Re: Recoil Spring Question

Posted: Wed Oct 31, 2018 4:41 pm
by NorincoKid
flcracker wrote:
Wed Oct 31, 2018 3:26 pm
Maybe a mag spring from a shotgun? :?:
Not outside the realm of possibility, but it came with a buffer on/in it. Also was some odd "rings"? and a firing pin, which looks like it may be a little longer than standard AR too?

Re: Recoil Spring Question

Posted: Wed Oct 31, 2018 7:35 pm
by rentprop1
pics would help

FYI...An AR buffer will not fit inside a shotgun mag spring

Re: Recoil Spring Question

Posted: Thu Nov 01, 2018 6:14 am
by Lastrites
Is it a flat wire spring were the coils/spring flat instead of round? If so it may likely be a Tubb's shooting system spring which are considerably longer than a standard spring.

Re: Recoil Spring Question

Posted: Fri Nov 02, 2018 8:35 am
by jwperry
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At 17" long I can't think of any spring, other than a shotgun tube spring, that it could be.

Re: Recoil Spring Question

Posted: Fri Nov 02, 2018 9:48 am
by NorincoKid
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Re: Recoil Spring Question

Posted: Fri Nov 02, 2018 10:10 am
by rentprop1
thats a cheap Chinese rifle buffer, lord knows on the spring , unless the buffer is really light ??do you have a way to weigh that buffer in OZ's