I do not have mine yet but this is my plan.

Some comparison pics

The third sierra has the ecco griffen adapter.



Explorr, recce5, turboK, mg7

Roughly yes

Pretty sure I checked that today and it was a nogo but I will confirm tomorrow.  I could be mistaken.

The ecco mount is just* barely not long enough for any of the flash comps but the plan a xl will work for those.  The regular plan a will work with a minimalist comp for sure.

We ran a hammer comp and ecco with it this evening and it did fine.

Subjective but!

We shot the sierra5 with ecco adapter side by side this evening with the recce5 and explorr 224.

Recce5 to me had the least backpressure and the sierra the worst.  But it was minimal between them.  My eyes watered a bit on the sierra5 but not the others but it was not much gas.

Sound wise they were all close but I would give the edge again to the recce.  Had the best tone with the explorr really close and the sierra seemed a bit sharper.

Shot the three on a 16" larue predatar and a 11.5DD m16.  Both guns gassed for the recce5.


None of these cans are a bad option!

Rex is king of "suppress more rifles, screw QD bullshit"




We brought in a stupid specced 14 and camera set-up for doing this but time hasn't been friendly for us yet ...  And the next month or so is wrecked but hoping.

Plan A engaging taper and cans first baffle touching the hammer comp.  Nogo





Roughly 1.66" from baffle to end of can without any adapters

Pretty much the same as the Rex cans.  The rex has .1" more room from ass end to first baffle.

Thats cool on the field comparison.

We flash tested a couple of those yesterday.  That took all day.  It would take a lot longer to graphically arrange all the photos taken. Three rounds each pmc 55 grain bronze out of a 14.5” m4A1 barrel.  We were indoor with zero light.

The recce 5 m4sdII, m4sdk, and dual lok hrt have low first round flash, and are then invisible.  

The sierra 5/keymo had low flash on the first round, and slightly lower flash on subsequent rounds, pretty decent performance in the flash category.

The surefire rc2 had lower first round flash than the other cans tested, but also had flash on every round.

The sig slx556qd has a white flash about 1.5” diameter and maybe 10” long on the first round, and then drops off to very dull red pencil eraser flashes shorter than the rc2, visible at 90 degrees.   That first round was bright- behind the gun it looked like white light.

The Aem5 had a 6” long orange flash on the first round that drops to nothing afterward. We were firing the 16” mod h spr.

The dual lok cans have low to moderate first round flash followed by very low flash and then the third round is invisible. The dual lok psr’s are a bit better and have no flash on the second round.

We tested an explorr .224 universal with dual lok mount on a 2.25” flash suppressor.   The unit had first round flash about 2” long, followed by zero flash.   Behind the gun I saw no atmospheric light for three rounds, but the camera at 90 degrees doing extended aperture work picked up light on the first round.


As far as first round flash from best to worst:

FA762SS (no flash [zero flash] m118lr on 25” m40a5)
Dual lok psr (m118lr on 25” m40a5)
Dual lok hrt
Surefire rc2
Recce 5, m4sd2, m4sdk
Sierra 5
Dual lok psr 556
Explorr .224/ with dual lok mount
Dual lok 556
Aem5
Sig SLX556QD

In terms of flash after the first round, from best to worst:

FA762SS (winner by not having first round flash)
Recce 5, dual lok hrt, m4sd II, m4sdk, Dual lok psr 762 and 556, Explorr.224, AEM5 all the above had no second round flash
Surefire rc2(minimal flash on every round never stops)
Dual lok 556(flash on third round is gone)
Sig SLX 556QD (im putting this here because at 90 degrees we are missing 1.15” of depth of the front cap and all the flash happening in there, although visible flash at 90 degrees is present, dull red, and smaller than the rc2).
Sierra 5 (there was visible light emitted on each round, and for some reason it was slightly illuminating the environment, even though the appearance at the front cap was relatively nominal from 90 degrees).

The human eye sees at 1000hz according to some sources, but youtube only supports 60hz.  On account of that, I figured video couldn’t adequately display flash, unless in slow motion which itself would also distort perception of reality, and opted for 3 second aperture exposure photos at 1000 iso. I do believe some flash events happen very fast.

We may video something at some point, and might find the results to be different than the hypothesis.  

These looked very similar to what we were seeing, but Im not going to say this is the best way to test.

I did notice a few fliers, for instance I saw zero light shooting the Explorr.224, 3 times, but the camera picked up a first round flash, so my grading system went with the camera in the grading, and the camera flash on first round had a big impact on where it fell. I may not have seen the flash because I was behind the gun, but that wasn’t really effecting me on most other cans.

The sierra was creating light flickers in the ambient environment on all three rounds, which was noticeably different, and the camera at 90 degrees improved its grading.  The picture carried more weight than the observations.

The surefire fa762 was the only other can for which I saw zero first round flash, and the camera at 90 also saw zero flash.

Truth about guns used a light meter, and that seemed to work great. In the past Robert Silvers claimed to be able to measure all the pixels of light in a photograph with a software I think. These methods are probably both superior to what I was using.