Low Back Pressure Suppressors - Opinions and Recommendations

[mig1nc]

On a related tangent, Suppressed Nation makes interesting videos. They did the ones I posted about that tested at ear and muzzle numbers for two Rex cans that were identical except for bore size on two different hosts.

Jumping in on that tangent, I just got my Rex can out of jail.

Man, it is shockingly quiet at the ear for a roughly FIVE inch can.

So far, I've only shot it on my 11.5" MCX SBR with the gas system set to suppressed.


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[Clint]

Which one?

Jumping in on that tangent, I just got my Rex can out of jail.

Man, it is shockingly quiet at the ear for a roughly FIVE inch can.

So far, I've only shot it on my 11.5" MCX SBR with the gas system set to suppressed.

[mig1nc]

Which one?

Honoris with 556 bore.

I bought it TWO Black Fridays ago. Got caught in the government shutdown. F4 trust.

I think they've discounted that specific model since then, but they have an updated equivalent counterpart.


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[JoshNC]

And how do you know they are low BP? I own 3 SF SOCOM cans myself, whats your point there?

You want really low back pressure? Flash hiders work great at that. Sound decibels are part of the equation in signature reduction, that's why we run cans.

I know they are low back pressure relative to the many other cans I’ve shot based on direct comparison to said other cans. The signs and symptoms of high back pressure are not a mystery. My personal criteria for center fire rifle cans are the mount design, back pressure, repeatability, FA capability (where applicable), then sound reduction. Chasing dB results in higher back pressure.

[Clint]

Yes, it seems like that model has been reborn as the MG7k 224.

https://www.rexsilentium.com/MG7-K-R...224-p148947022

Got one on the way.

Good to hear that it does a nice job with the sound.

How is the Back Pressure?

Honoris with 556 bore.

I bought it TWO Black Fridays ago. Got caught in the government shutdown. F4 trust.

I think they've discounted that specific model since then, but they have an updated equivalent counterpart.

[Hersh]

Thread 'jack if you guys would educate me. As a general rule, will you get more back pressure on a suppressed SBR than a 14.5 or longer? I'm new to cans and just got my Sandman-S out of jail last week, thanks.

[Clint]

The effect of a suppressor will vary depending on gas system configuration and barrel length.

In general you will get more increase in cyclic rate from the shorter barrels than longer ones because the muzzle pressure is higher and powder may still be burning.

Often times, you can get really nice mixed suppressed use from 14.5 or longer barrels.

The shorter barrels don't generally do it as nicely and can really benefit from dedicated suppressed configurations.

Thread 'jack if you guys would educate me. As a general rule, will you get more back pressure on a suppressed SBR than a 14.5 or longer? I'm new to cans and just got my Sandman-S out of jail last week, thanks.

[themonk]

You also get a lot of unburnt powder that can cause flash especially in 10.5" barrels. You generally get full powder burn out of a 12.5" and up barrel. That is one of the main benefits to Surefire cans is their lack of signature.

[MistWolf]

Muzzle flash isn't from unburned powder. It's from high pressure superheated flammable gas igniting when mixing suddenly with fresh oxygen. If the muzzle flash was caused by unburned powder, flash suppressors would not work.

[mig1nc]

Yes, it seems like that model has been reborn as the MG7k 224.

https://www.rexsilentium.com/MG7-K-R...224-p148947022

Got one on the way.

Good to hear that it does a nice job with the sound.

How is the Back Pressure?

I have no way to measure bolt velocity, but gas face isn't as bad as my Griffin or old Ops cans.

I didn't really notice any, to be honest.


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