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Posted: 4/28/2011 9:12:46 PM EDT
[#1]
Unless you are using a Chrome-Silicon spring, replace it every 5,000 rounds.
For an M-4 firing 5.56 (as opposed to .223) I would go with the H-2 buffer. |
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Posted: 4/29/2011 4:33:48 AM EDT
[#2]
From troglodyte:
Measure the Action Spring. A rifle length Action Spring should measure between 11 3/4 and 13 1/2 inches and a Carbine length action spring should measure between 10 1/16 and 11 1/4 inches. If the action spring is shorter, replace it immediately. Use a standard USGI spring and avoid "heavier" action springs. H2 buffers may serve you well also. |
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Posted: 4/30/2011 2:48:35 AM EDT
[#3]
A dynamic system can be modeled as:
m*a+c*v+k*x=f(t) m=mass a=acceleration c=damping coefficient v=velocity k=spring constant x=position from free spring length f(t)= input f(t) and c can be considered constants. change m and/or k, then the acceleration and velocity will change. Bust out some Matlab/Simulink if you really want to get fancy. |
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Posted: 4/30/2011 3:40:43 AM EDT
[#4]
Quoted: A dynamic system can be modeled as: m*a+c*v+k*x=f(t) m=mass a=acceleration c=damping coefficient v=velocity k=spring constant x=position from free spring length f(t)= input f(t) and c can be considered constants. change m and/or k, then the acceleration and velocity will change. Bust out some Matlab/Simulink if you really want to get fancy.  |
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Posted: 4/30/2011 7:43:04 AM EDT
[#5]
Quoted:
A dynamic system can be modeled as: m*a+c*v+k*x=f(t) m=mass a=acceleration c=damping coefficient v=velocity k=spring constant x=position from free spring length f(t)= input f(t) and c can be considered constants. change m and/or k, then the acceleration and velocity will change. Bust out some Matlab/Simulink if you really want to get fancy. Isn't f(t) ammo dependent ... which is the root of all evil with regards to AR malfunctions! |
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Posted: 4/30/2011 10:57:27 AM EDT
[#6]
i roll my own.
only had about 2000 rounds through my AR, but not one failure of anytime, and brass lands in a nice neat pile. its a constant From calguns.net 
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Posted: 4/30/2011 11:04:03 AM EDT
[#7]
Quoted: i roll my own. only had about 2000 rounds through my AR, but not one failure of anytime, and brass lands in a nice neat pile. its a constant From calguns.net http://i216.photobucket.com/albums/cc137/addax/ARejectionpattern.jpg Interesting picture. I think I'll save that. |
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Posted: 4/30/2011 11:22:12 AM EDT
[#8]
Quoted:
Quoted:
i roll my own. only had about 2000 rounds through my AR, but not one failure of anytime, and brass lands in a nice neat pile. its a constant From calguns.net http://i216.photobucket.com/albums/cc137/addax/ARejectionpattern.jpg Interesting picture. I think I'll save that. Yeah it's pretty nice. I usually aim for 4:30 using the weakest ammo I shoot, that way I know it'll be 100% reliable plus I'm minimizing felt recoil. |
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Posted: 4/30/2011 12:34:58 PM EDT
[#9]
Sprinco/Tactical Springs standard and extra power action springs are great reliability upgrades, especially if you run suppressed.
Sprinco notes that their springs have a much longer life span than standard AR-15 buffer springs, and I believe it! I've got one I bought from Larue Tactical in 2008 that's still going strong despite running with and without a suppressor for around ~15K rounds (hurray reloading!) |
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