http://colt.com/law/lecarbine.aspQuote:
I have no Idea what a 6920 is.
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http://colt.com/law/lecarbine.aspQuote:
I have no Idea what a 6920 is.
Having a gun that will only run on a single type of ammo that may or may not be available to me when the SHTF is sort of like having an automobile that won't run on pump gasoline.
Who says I'm going to fight with my own ammo? (Analogous to Clint Smith: "Who says you're going to fight with your own gun?").
If I KNEW that I would always have a ready supply of Mk262 or 5.56 TAP, and if I knew that those I might be swapping mags with when Murphy comes calling would ONLY have the same ammo, then I might be comfortable knowing that my rifle would not work with "the who's who of underpowered ammo."
It baffles me why someone would spend hard-earned dollars on a precision barrel and then shoot ONLY SS109 bullets through it. :confused:
I believe that there is probably a certain degree of buffer/spring envy that gets promoted by these forums. "My carbine must be inferior; I don't have an H/H2/H3/9mm buffer. While I'm at it, I might as well replace that cheap spring. I just know that it's shrinking." :eek:
What most fail to realize is that all of the components work together as a system that must be in balance in order to ensure reliable function. Changing the spring RATE, buffer mass, carrier mass, friction due to gas ring(s), friction due to lube, ammo pressure, gas port diameter (modification or erosion) and any of a host of other factors can have a direct influence on the delicate balance.
Notice that I said "spring RATE". Changing the spring rate (e.g., force required to compress a coil spring a specific distance) changes the system balance. I have no issue with using superior spring materials from a fatigue (spring life) standpoint. The concern I have is that many may not understand that all available springs are likely NOT providing the same spring rate.
Ever put shorter/stiffer springs on a car? Ever install "sport-tuned" shocks/struts/dampers? Ever switch to low-profile tires? Ever add a significant amount of weight/load on a truck? Did these things affect the ride/handling? These are crude analogies to how changing carbine components might affect function (and they will affect function).
I agree. That is why I shoot all my weapons with TAP, BH, XM193 and Federal. All work well for me.
You would be amazed how well M855 will shoot out of a Noveske barrel. ;)
I don't follow the spring/buffer envy comment. We are all here to try and build the most accurate/reliable weapons. This takes trying various things to find out what works and what doesn't. I am kind of happy to see people trying different things (buffers and springs) instead of just accepting the norm.
I personally am against extra power springs in both the extractor and the buffer. I do however like springs with longer life (less likely to cause a malfunction due to loss of tension).
I was speaking with the guys at Tubbs that other day about spring life. They explained to me that a normal SS buffer spring is at about 90% of its useful life right out of the gate. :eek:
C4
FWIW the Canadian Forces when switching to the C7A2 (20" bbl and telestock) ran testing to see which buffer was the best for NATO ammo in various barrel lengths (many units are issues two uppers of different barrel lengths - some three - and inside CANSOFCOM 6+)
The H2 buffer was found to cycle the most reliably throught the NATO 5k testing program in the following lengths 10" (flat 10 not 10.3 or 10.5) 10.5, 11.5, 14.5, 16, 20, than the other weights.
As a result Canada standardized the H2 buffer for all telestock equipt gun in conventional force inventory.
(I've seen H2's used in 4"-6" M16FOW based PDW's as well)
I predominately use H2 buffers in all my guns --
IF the end of the world happens -- at least they will work with M855/SS109 stuff ;)
Brownells has standard power chrome silicon springs for carbine and rifle length in 3pks for less than $12 for people who want to use an H2 and an ISMI is too powerful.
Brownells
078-000-087 M4 Recoil Spring (CS), 3-Pak $11.76
078-000-102 AR-15 A2 Action Spring (CS), 3-Pak $11.76
They have extractor and ejector springs in chrome silicon as well.