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It does, but the overall effect seems to be an increase in cyclic rate. The additional force at maximum compression means greater acceleration of the reciprocating mass. See this comparisons of carbine springs with a Sprinco blue (the principle is the same):
http://www.vuurwapenblog.com/reviews...e-differences/
It's important to use a quality milspec spring, since cheaper ones may lead to erratic cyclic rates.
Sent from my ZTE A2017U using Tapatalk
That was a Sprinco blue spring. It is shorter than the green and there's nothing to indicate the compression and relaxation rate are the same.
INSIDE PLAN OF BOX
- ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
- MATCH SCRATCHES ON MATCH-BOX
- MATCH LIGHTS FUSE TO TNT
- BOOM!
- HA-HA!!
-WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"
I am American
Not really. Whatever it does to delay the initial movement of the bolt will be countered by increasing the bolt velocity going into battery.
Springs are incredibly efficient, and will give you back almost all the energy you put into them. Most self loading guns rely on the impact of the bolt/slide to the rear to dissipate some of bolt energy as heat (compression of the elastomer tip of the AR buffer when it impacts), and then the spring returns the bolt to battery. When you use a stronger spring than designed, you've stored some of that impact energy instead of letting it go into the frame, and then you put it back into the forward movement of the bolt. The stronger spring essentially causes the bolt to "short stroke" instead of bottoming out with the full designed force.
Whatever kind of self loading mechanism you have, the best way of moderating the energy fed into the bolt/slide is by adding mass - like how a .40 USP has a heavier slide than a 9mm USP. In the case of a gas powered rifle, you also can control the energy directly by limiting the gas. Springs in either case just shift the energy around - it doesn't go away.
If I couldn't affect the gas or bolt/buffer mass, I would want to use a softer/thicker elastomer to dissipate more energy at the rear of bolt travel and a standard spring to keep forward velocities in check.
The other thing you can do with hammer fired weapons is to use a different leverage relationship between the hammer and bolt, since that only affects the first bit of bolt movement and not the rest of the cycle. Stiffer mainsprings or a squared firing pin stop in 1911s accomplishes this.
INSIDE PLAN OF BOX
- ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
- MATCH SCRATCHES ON MATCH-BOX
- MATCH LIGHTS FUSE TO TNT
- BOOM!
- HA-HA!!
-WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"
I am American
It's a wash if your only concern opening speed and not feed jams.
However, a spring in its most extended position (bolt in battery) is going to have the least ability to affect bolt opening speed compared to a weaker spring. The biggest effect will be at full compression, not where you want it.
Do you know how fast a carrier has to run before it will outrun a modern AR mag? Pretty damn fast! I had a grossly over-gassed shorty with stupid high carrier speeds. It never outran any of my magpul mags or modern GI mags. It never had a feed jam, even when I used it with a full auto lower.
In any case, when used with an A5 RE, the green spring gives my ARs smoother operation than a standard rifle spring does.
If you go back, you'll see I was questioning the claim that a stronger springs delays opening, speeds closing while giving higher carrier speeds. Seems to me there is a contradiction in there, someplace
Last edited by MistWolf; 12-14-18 at 00:18.
INSIDE PLAN OF BOX
- ROAD-RUNNER LIFTS GLASS OF WATER- PULLING UP MATCH
- MATCH SCRATCHES ON MATCH-BOX
- MATCH LIGHTS FUSE TO TNT
- BOOM!
- HA-HA!!
-WILE E. COYOTE, AUTHOR OF "EVERYTHING I NEEDED TO KNOW IN LIFE, I LEARNED FROM GOLDBERG & MURPHY"
I am American
Unless you combine overgassing with a stronger spring, there is no reason the bolt closing speeds are going to be anywhere as high as the opening. The opening velocity is absorbed by the impact of the buffer on the back of the buffer tube. So there isn't a good reason for a standard spring to close the action much faster than a correctly gassed action.
Imagine a spring that is twice as strong as required. It will resist BCG movement twice as hard and will cause it to rapidly short stroke, opening and closing at the same rate because it never dumps any energy into the buffer tube.
I'm not the only one who thinks this is the case. Read this thread:
https://www.m4carbine.net/showthread...se-cyclic-rate
Last edited by bruin; 12-14-18 at 02:59. Reason: tapatalk
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