Anyone have the actual percent amount of recoil reduction the comp/brake provides? Or atleast in comparison to other brakes, for me the anecdotal "well recoil is alot lighter" doesnt really tell me much.
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Anyone have the actual percent amount of recoil reduction the comp/brake provides? Or atleast in comparison to other brakes, for me the anecdotal "well recoil is alot lighter" doesnt really tell me much.
Depends on the weight of the gun. That doesn't help much, either, though. For me, it's not so much the recoil, you still get a little poke in the nose shooting NTCH, but the sights don't jump off the target as much. In a hammer or double tap situation, I can keep my shots closer together. I might be able to shoot my DDM4 with FSC556 next to my buddies DDM4 with A2, see if I can actually measure a difference at 10-15 yards or so in doubles. I don't know of a way to measure the recoil, but that might help give an idea on muzzle rise. Of course, that still, will only show the difference between FSC556 and A2. Results would likely be differenty with a Vortex or Blackout. I'll see what I can do, maybe someone else has already done the same thing.
Depends on the gun but around 30% less than without it is something you can count on.
I'd say that's a pretty good comparison.
It's not quite as good as a real comp but it does a hell of a lot better as a comp vs. an A2 or any other flash hider type comp. Most true comps increase flash, the FSC556 does not. It truly does reduce flash and work very well as a comp.
Chief Armorer for Elite Shooting Sports in Manassas VA
Chief Armorer for Corp Arms (FFL 07-08/SOT 02)
I would agree with around the 30% mark. I have one on my midlength 16 inch barreled ar. After adding some accessories that have added weight but with those accessories taken off, it does seem around the 30% mark. Although the 5.56 or .223 round doesn't have much recoil. But as was said before it does help keep the sights on target
Hmm that seems alittle low. Many other brakes out there offer 40-50% recoil reduction most being around 42-45%.
I'd like to know how they are quantifying recoil reduction...
But remember, the FSC556 does double duty by not throwing huge fireballs...
It is not a Vortex or Phantom, but it is not a flamethrower either.
Claims for what I call loudeners are measured in different ways, on different rifles, and often made up. There are other brakes which will do more, but will be louder, and have more flash. I don't doubt there are some that would do 40-50% reduction on some rifle/ammo combos. Perhaps this one:
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Last edited by rsilvers; 05-03-09 at 03:20.
Those do reduce recoil by at least 45-50% on some rifles. That type of brake on a 5.56mm/.223 gun really isn't ideal. Other brakes which are much smaller work very comparably. That JP style brake works much better on bigger higher pressure rounds like .300 Win Mag and others which have much more gas volume vs. the small .223.
Many other factors make up the recoil of the rifle.
Things that effect recoil are:
the cartridge being fire (some has less recoil than others)
bolt velocity (things like the length of the gas system and gas volume regulate this)
weight of the rifle (and more importantly how the rifle is balance)
the weight of the moving mass (the weight of the BCG and buffer)
My 3gun rifle shooters very flat and with very light recoil.
How I made it that way, 18" rifle gas WOA barrel, JP adjustable gas block, 6.25oz low mass JP carrier, I made a 1.8oz CAR length buffer with standard rate CAR buffer spring, a SJC Titan muzzle brake.
At first when I set this gun up I had the gas system adjusted so light that I could barely feel the bolt lock back when the rifle ran empty. So to ensure that it would run for me, I gave it another 1/2 turn open on the gas block and I use +10% XP Wolff mag springs in my mags to ensure that they're keeping up with the very fast bolt velocity. With 75gr Prvi ammo which shoots very light as well I discovering that it's needing a little more gas too. Many people ask why do I need a brake on AR. My answer to this is that this rifle is purely a race gun. Sometimes the difference between 1st and 2nd place etc is measured in 100ths and 1000ths of a second so it does matter.
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Chief Armorer for Elite Shooting Sports in Manassas VA
Chief Armorer for Corp Arms (FFL 07-08/SOT 02)
What is the testing mechanism, and what are the units of measure, for determining recoil reduction and/or substantiating claims of same? Is there a separate test for straight-back recoil vs. muzzle climb?
Robert, I think you had talked elsewhere about building some kind of a jig to test this. Any progress on that?
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