Shooting the 50 BMG

[J E CUSTOM]

Here is a video of a new muzzle brake that tames the beast.

It compares the Barrett brake to the new progressive brake design.

Barrett M82A1 50 Cal - YouTube

J E CUSTOM

 

[Outlaw45]

Except for flash, looks like the Barret does better.

 

[J E CUSTOM]

Except for flash, looks like the Barret does better.

Looks can be deceiving. We tried shooting the Barret with remote firing and It did a back flip and I had to catch it.

With my brake it moved straight back and only about 8''. The big plus was the sound and pressure wave. we were able to
shoot it very comfortably with ear plugs only and the rifle stayed on target without having to reposition our selves for a 10
round string of 750 grain loads.

The Barrett also put out a huge signature/muzzle flash even in daylight and the Assassin kept most of the flash within.

The factory brake forced the gasses back within less than a foot of the shooters ears and kicked up all sorts of debris on the shooters.

Everyone that has shot the Assassin brake cant believe the difference.

I am not trying to put down any muzzle brake, just trying to show that improvements can be made to anything with some out of the box
thinking and fair and impartial testing.

Thanks for you comment.

J E CUSTOM

 

[ORD]

Any issues with proper cycling of the rifle with your "Assassin" brake installed?

Having monkeyed around with a variety of brakes/designs for the M82 over the years, I know that they can be somewhat "finicky" when it comes to functioning properly with some, especially when running lighter ball ammo loads. Certainly doesn't look that way from your video though. I like what I see so far!!!

 

[J E CUSTOM]

Any issues with proper cycling of the rifle with your "Assassin" brake installed?

Having monkeyed around with a variety of brakes/designs for the M82 over the years, I know that they can be somewhat "finicky" when it comes to functioning properly with some, especially when running lighter ball ammo loads. Certainly doesn't look that way from your video though. I like what I see so far!!!

Thank you.

I have shot everything from the Argentine ammo to the 750 grain Hornady and did not have any problems.
When I started working on a design I knew that on a recoil operated rifle if I reduced the recoil to much It would be very finicky.

With that said I then calculated the port volume of the factory brake and reduced the volume of the 5 ports on my design to almost the
same to assure that it would still function the action of the M82. This would also help in the evaluation of the progressive port angles.

The only time I worried about the ejection was when we did the remote test where the rifle was un-restrained and allowed to move back
away from the barrel recoil preventing it from functioning . As you can see it did fine. the other thing that the progressive ports did was
to reduce the recoil velocity, Making it feel pleasant and like a lot less recoil.

There is one problem, It is so much fun to shoot I goes through ammo like pork through a goose.

Thanks again

J E CUSTOM

 

[mike in pa]

Looks good. Keep us posted on availability.

 

[fx77]

Is this proprietary design applicable and effective to lesser calibers?

 

[GunMax]

Nice i like it!!! How much is it going to cost?

 

[carlbobh]

Is this proprietary design applicable and effective to lesser calibers?

The brake is very effective on all calipers tested so far. I have one on my AR15 and a friend has one on a AR10. I had one put on my .300 RUM but haven't been to the range yet to test it. Will get out there this week and post the video with results


The testing video for the brake is available at.

Muzzle Brake Testing - YouTube

 

[microsuck]

Brakes are all about surface area. You can usually tell how effective a brake will be by how much surface area the muzzle gas can exert force against. In my experience, size of the surface matters a lot more than the number of chambers. A 2" diameter 1" long brake will outperform a 2" long, 1" diameter brake.

 

[problemchild]

Video of BOTH brakes shooting with no shooter. Why do just one? Id like to see the gun do a backflip. Do you have the video?
In the second video you did not test one popular brake (surefire, battlecomp, BCM etc), Why?

 

[J E CUSTOM]

Video of BOTH brakes shooting with no shooter. Why do just one? Id like to see the gun do a back flip. Do you have the video?
In the second video you did not test one popular brake (surefire, battlecomp, BCM etc), Why?

Good question.

First, The test were to test for recoil,muzzle flash, muzzle rise,DB levels and pressure wave. We did lots of test shooting the rifles
but they only show the perception, and we wanted to keep the test Apples to Apples.

We tested lots of brakes and some were very identifiable and our intent was not to target any manufacture . we tried to find the
different styles of brakes to do the comparison and obviously we couldn't test all of the brakes out there.

On the back flip issue, The rifle and scope are valued at over $11,000.00 and the first time it flipped I was lucky there will be no second time.
I have seen videos of rifles being shot off the bench or otherwise abused and I have a problem treating my equipment that way. If you noticed the 50 was tested on the ground for that reason.

As stated in the video, these test were done ,not to discredit any other brake but to show the performance of the new design.

Thanks for the question . I hope this answered your questions.

J E CUSTOM

 

[a1-equipment]

What's the price on your brake? Any trick to installing it. I have never had the brake off my m82

 

[carlbobh]

Brakes are all about surface area. You can usually tell how effective a brake will be by how much surface area the muzzle gas can exert force against. In my experience, size of the surface matters a lot more than the number of chambers. A 2" diameter 1" long brake will outperform a 2" long, 1" diameter brake.

It's true that surface area is one factor when designing a brake but there are many others that determine the brakes effectiveness. Some things to consider would be port volume, how many ports, angle of the ports, bore diameter .. etc. What about the powder charge, velocity? The 50 BMG uses 10+ times the powder as a 223. The goal of any brake should be to reduce the recoil affects of the gas by diverting it in another direction. On most hi-powered rifles about 65% of the recoil comes from the burning of the powder. the rest is from the energy of the bullet movement. Simply making a brake longer or larger in diameter may have some gain, but in the same respect it may have a negative impact. As for number of chambers .. The Barrett brake is the same volume as the Assassin, Barrett as 2 chambers per side, Assassin has 5. Yet the Assassin is more effective at recoil, noise reduction and signature is greatly reduced.

 

[J E CUSTOM]

What's the price on your brake? Any trick to installing it. I have never had the brake off my m82

The M82 AI is easy to change brakes on, simply remove the two bolts and washers and un-screw the factory brake.

To install the Assassin brake place the Belleville washer (Crush washer)on the threads, screw the Assassin on and time it with the washer,
and set the set screws to keep it timed.

It is engraved on both sides so it can be timed in with less rotation (180o max).

I will furnish a new crush washer in case yours is not good.

The price for now is $325.00 mat or polished, and $375.00 for the QPQ coated brake (In production the QPQ coating will cost $100.00 dollars more) than the few I have now.

J E CUSTOM

 

[J E CUSTOM]

It's true that surface area is one factor when designing a brake but there are many others that determine the brakes effectiveness. Some things to consider would be port volume, how many ports, angle of the ports, bore diameter .. etc. What about the powder charge, velocity? The 50 BMG uses 10+ times the powder as a 223. The goal of any brake should be to reduce the recoil affects of the gas by diverting it in another direction. On most hi-powered rifles about 65% of the recoil comes from the burning of the powder. the rest is from the energy of the bullet movement. Simply making a brake longer or larger in diameter may have some gain, but in the same respect it may have a negative impact. As for number of chambers .. The Barrett brake is the same volume as the Assassin, Barrett as 2 chambers per side, Assassin has 5. Yet the Assassin is more effective at recoil, noise reduction and signature is greatly reduced.

Thanks Carlbobh.

Port volume was one of my concerns when designing the brake that would improve or eliminate all or the bad effects of a brake
and improve shooter comfort.

In the case of the M82 with its recoil action had I gone with more "Large" ports it may have reduced recoil to much and rendered
the recoil action useless/non-functional.

With all of the areas I was trying to improve at the same time I had to break some long standing rules and think outside the box.

With all of this testing there is still some room for improvement, and every day is a new learning experience.

I have tried to read as much as possible on this subject and Julian Hatcher has a great book on the subject of recoil reduction.

In his book he talks about the bullet inertia being 30% of the recoil that can only be effected by bullet weight, velocity and rifle weight and the 70% of the recoil being the gas (something we can deal with)

So this made me feel good about any brake that approaches 60% recoil reduction with the of the combined 30 and 70 (100 % of the total recoil)
with a maximum of 65 to 70% of possible reduction in the recoil from the gas.

So any brake that exceeds 40% is managing more than 50% of the gas on a rifle that has 70% gas recoil.

The fact that some gas is always going to escape out the front of the brake (Anything going out the front is recoil)
means that somewhere there is a limit of 60+% reduction in recoil.

Thanks for your post

J E CUSTOM

 

[J E CUSTOM]

Is this proprietary design applicable and effective to lesser calibers?

Sorry . I didn,t see your post sooner.

Yes , It is very effective on lesser calibers . We tested the Assassin on 223s, 6.8s, 308s, 300 RUMs, 338s and the 450 bushmaster.

The smaller calibers were slightly more effective than the larger calibers. How ever, when I tuned some of the brakes For that particular
cartridge they got even better recoil reduction (from 55+% reduction to Almost 60%) we have some of the tuned brakes on the 6.8 SPC,
300 RUM, 338 RCM an the 450 bushmaster now that are ready for testing.

There is a video on post #9 of this thread that shows the amount of recoil reduction and muzzle control on small calibers.

And for GunMax, I will post a price list as soon as I pay this site for advertising per there rules.

Thanks again.

PS: I receiver word yesterday that my patent was pending and it looked good for approval also the copyright would go through.

So I will be in full production soon. I still have a few of the first run if anyone is interested PM me.

J E CUSTOM