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Posted: 1/9/2015 3:28:18 PM EDT
[#1]
RRA has a stock spacer that we use in a rifle-length extension with a 9mm (CA-length) buffer and CAR action spring. If I'm reading your question correctly, that would work for your described use as well. The part number is 9MM0073.
Steve/RRA |
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Posted: 1/9/2015 4:08:41 PM EDT
[#2]
found it. $8. derilin? solid or hollow inside like a thick walled pipe? Or is it pretty light weight to begin with.
http://www.rockriverarms.com/index.cfm?fuseaction=category.display&category_id=244 yes, to be clear, I am looking to use a carbine lenght buffer/spring w/ an A1/A2 rifle receiver extension, so I need some sort of plug to fill the extra space inside. |
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Posted: 1/9/2015 4:57:20 PM EDT
[#3]
It's solid and it's just plastic, is not heavy.
For a light duty or experimental application you could use a 1" wood dowel, cut to the right length. |
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Posted: 1/9/2015 6:22:35 PM EDT
[#4]
You should reevaluate why you want them to use the same spring and buffer. Assuming you are not trying to get away with using just using one buffer and spring and moving it between lowers, which it doesn't sound like your are, there is only disadvantages to not using a rifle buffer and spring. Might as well enjoy the increased reliability, lower cyclic rate, more spread out recoil impulse of a rifle system as long as you are running a rifle tube anyway.
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Posted: 1/9/2015 6:40:29 PM EDT
[#5]
Quote HistoryQuoted:
You should reevaluate why you want them to use the same spring and buffer. Assuming you are not trying to get away with using just using one buffer and spring and moving it between lowers, which it doesn't sound like your are, there is only disadvantages to not using a rifle buffer and spring. Might as well enjoy the increased reliability, lower cyclic rate, more spread out recoil impulse of a rifle system as long as you are running a rifle tube anyway. the alleged more spread out recoil impulse of a rifle is due to the longer gas system, not the buffer/spring. A rifle buffer is heavier w/ heavier weights, about like a H3 Buffer IIRC so that would reduce the cyclic rate, all things being equal. this is a custom type job w/ LW parts and adj gas stystem that will be tuned for a spring/buffer. If I don't get all uppers tuned to one spring/buffer then I need easily move my buffer/spring between lowers, hence my interest in the plug. I had though of a dowel, but if it got wet or whatever it could be a problem, though in most all applications it would work fine admittedly and be lightweight. |
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Posted: 1/9/2015 11:19:48 PM EDT
[#6]
Of course there are many factors, but the longer spring and lower spring force certainly are an aspect that changes the fexoild impulse. Especially in regard to the bolt slamming back home when chambering a round. That is what many find pulls their sights of target the most.
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Posted: 1/12/2015 3:36:14 AM EDT
[#7]
Quote HistoryQuoted:
Of course there are many factors, but the longer spring and lower spring force certainly are an aspect that changes the fexoild impulse. Especially in regard to the bolt slamming back home when chambering a round. That is what many find pulls their sights of target the most. lower spring force?? |
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Posted: 1/12/2015 3:43:28 AM EDT
[#8]
Quote HistoryQuoted:
the alleged more spread out recoil impulse of a rifle is due to the longer gas system, not the buffer/spring. A rifle buffer is heavier w/ heavier weights, about like a H3 Buffer IIRC so that would reduce the cyclic rate, all things being equal. this is a custom type job w/ LW parts and adj gas stystem that will be tuned for a spring/buffer. If I don't get all uppers tuned to one spring/buffer then I need easily move my buffer/spring between lowers, hence my interest in the plug. I had though of a dowel, but if it got wet or whatever it could be a problem, though in most all applications it would work fine admittedly and be lightweight. Quote HistoryQuoted:
Quoted:
You should reevaluate why you want them to use the same spring and buffer. Assuming you are not trying to get away with using just using one buffer and spring and moving it between lowers, which it doesn't sound like your are, there is only disadvantages to not using a rifle buffer and spring. Might as well enjoy the increased reliability, lower cyclic rate, more spread out recoil impulse of a rifle system as long as you are running a rifle tube anyway. the alleged more spread out recoil impulse of a rifle is due to the longer gas system, not the buffer/spring. A rifle buffer is heavier w/ heavier weights, about like a H3 Buffer IIRC so that would reduce the cyclic rate, all things being equal. this is a custom type job w/ LW parts and adj gas stystem that will be tuned for a spring/buffer. If I don't get all uppers tuned to one spring/buffer then I need easily move my buffer/spring between lowers, hence my interest in the plug. I had though of a dowel, but if it got wet or whatever it could be a problem, though in most all applications it would work fine admittedly and be lightweight. Or get a 1" piece of derilin and make your own? |
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Posted: 1/12/2015 3:44:23 PM EDT
[#9]
Check out Spike's tactical. I believe they make what you are looking for.
http://www.spikestactical.com/lower-parts-spikes-stt0-buffer-spacer-p-709.html |
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Posted: 1/12/2015 3:48:08 PM EDT
[#10]
Quote HistoryQuoted: Check out Spike's tactical. I believe they make what you are looking for. http://www.spikestactical.com/lower-parts-spikes-stt0-buffer-spacer-p-709.html |
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Posted: 1/12/2015 7:56:48 PM EDT
[#11]
Quote HistoryQuoted:
Or get a 1" piece of derilin and make your own? Quote HistoryQuoted:
Quoted:
Quoted:
You should reevaluate why you want them to use the same spring and buffer. Assuming you are not trying to get away with using just using one buffer and spring and moving it between lowers, which it doesn't sound like your are, there is only disadvantages to not using a rifle buffer and spring. Might as well enjoy the increased reliability, lower cyclic rate, more spread out recoil impulse of a rifle system as long as you are running a rifle tube anyway. the alleged more spread out recoil impulse of a rifle is due to the longer gas system, not the buffer/spring. A rifle buffer is heavier w/ heavier weights, about like a H3 Buffer IIRC so that would reduce the cyclic rate, all things being equal. this is a custom type job w/ LW parts and adj gas stystem that will be tuned for a spring/buffer. If I don't get all uppers tuned to one spring/buffer then I need easily move my buffer/spring between lowers, hence my interest in the plug. I had though of a dowel, but if it got wet or whatever it could be a problem, though in most all applications it would work fine admittedly and be lightweight. Or get a 1" piece of derilin and make your own? 1" ABS machinable rod, $7/foot http://www.mcmaster.com/#standard-plastic-rod-stock/=vfuidl can't seem to find derilin rod. maybe going by anothe name. |
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Posted: 1/12/2015 8:00:34 PM EDT
[#12]
anyone know what the exact length should be?
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Posted: 1/14/2015 3:02:16 PM EDT
[#13]
Quote HistoryQuoted:
found it. $8. derilin? solid or hollow inside like a thick walled pipe? Or is it pretty light weight to begin with. http://www.rockriverarms.com/index.cfm?fuseaction=category.display&category_id=244 yes, to be clear, I am looking to use a carbine lenght buffer/spring w/ an A1/A2 rifle receiver extension, so I need some sort of plug to fill the extra space inside. Tubular Delrin. Negligible weight. You put it in the rifle length extension first, then the CAR action spring, then the CAR buffer. Its length is the difference in length between the two extensions. Steve/RRA |
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Posted: 1/18/2015 2:54:52 AM EDT
[#14]
I got some ABS from mcmaster, needed some other stuff too. Sorry.
so I'll cut it and square it off on the disk grinder. The length... So all I need to do is subtract the length of a car RE, internally, from that of a rifle RE right? give myself a little extra material to ensure I don't have key strike? |
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Posted: 1/18/2015 8:30:14 PM EDT
[#15]
Quote HistoryQuoted:
I got some ABS from mcmaster, needed some other stuff too. Sorry. so I'll cut it and square it off on the disk grinder. The length... So all I need to do is subtract the length of a car RE, internally, from that of a rifle RE right? give myself a little extra material to ensure I don't have key strike? Considering that a rifle extension has a threaded hole in the rear, and the carbine doesn't, I doubt that this will give the exact result you want. But, if anything, it would give a longer result, which is fixable. I pulled this from Brownells: Rifle and carbine buffers for DPMS .308 style rifles Standard rifle buffer specs: length 5.285", weight 5.4112oz Carbine buffer specs: length 2.485", weight 3.808oz |
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Posted: 1/19/2015 1:24:57 AM EDT
[#16]
Quote HistoryQuoted:
Considering that a rifle extension has a threaded hole in the rear, and the carbine doesn't, I doubt that this will give the exact result you want. But, if anything, it would give a longer result, which is fixable. I pulled this from Brownells: Rifle and carbine buffers for DPMS .308 style rifles Standard rifle buffer specs: length 5.285", weight 5.4112oz Carbine buffer specs: length 2.485", weight 3.808oz Quote HistoryQuoted:
Quoted:
I got some ABS from mcmaster, needed some other stuff too. Sorry. so I'll cut it and square it off on the disk grinder. The length... So all I need to do is subtract the length of a car RE, internally, from that of a rifle RE right? give myself a little extra material to ensure I don't have key strike? Considering that a rifle extension has a threaded hole in the rear, and the carbine doesn't, I doubt that this will give the exact result you want. But, if anything, it would give a longer result, which is fixable. I pulled this from Brownells: Rifle and carbine buffers for DPMS .308 style rifles Standard rifle buffer specs: length 5.285", weight 5.4112oz Carbine buffer specs: length 2.485", weight 3.808oz right, but the carbine buffer spring goes tot he front, the rifle the rping is stood back... of course...spring length is another matter, OAL of hte buffer is at issues, so about 2.8" would be it per those figures... I guess I'll put a little lipstick on the lower and make sure hte gas key isn't marking it when I pull it all the way back. |
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