I finally got my paperwork back and picked up my can. This is one of Delta P’s 7.62x39 AK cans that works with AK-74 type threads.
A friend today arranged to meet me at his property to shoot. He only had a little while to shoot before needing to leave, so we put a few rounds down range at a time, concentrating on things like the way the rifle sounded when standing different distances from the shooter, noting muzzle rise and comparing to the '74 compensator, and attempting to determine at what distance the sound of the bullet flight overcame the “pop” from the rifle.
Since the can is being used with a 16" 5.56 barrel, but is intended for 7.62x39, and since it also features a unique, progressively larger-bore baffle setup to eliminate issues with baffle strikes due to '74 type threaded FSBs frequently not being perfectly parallel with the bore (the diameter of the end cap orifice is about 1/2"), I wasn’t expecting a super quiet can.
Without having another can and rifle to compare it with (this is the first can I have owned and only the third I’ve shot with), I can’t tell how it compares for sound suppression, but I was able to note the following:
[ul][li]Shooting about 20 rounds without earpro did not cause ringing of the ears, but did cause just enough of a “spike” each shot to make me think it is not hearing safe. It seemed to fall somewhere between a .22 pistol and rifle in the way it made me feel- like it wouldn’t bother me shooting for a little while, but an extended session might leave me with a slight headache.[/ul]
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[ul][li]When standing roughly 25 yards away to the shooter’s 4 o’ clock, the “Pop” seemed to be mostly or totally overwhelmed by the traveling and impact sounds of the round, as the berm was only about 30 yards away from shooter. Those sounds were clearly louder and drew more attention to the impact area than to the weapon itself.[/ul]
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[ul][li]There was no feeling at all of having gas blown up the nose! I imagine the larger bore along with the larger than average diameter of the can is responsible for this. It completely lacked any semblance to my gas nose experience firing an M4 with a tac16.[/ul]
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[ul][li]It’s weight of just under 20.5 oz compares favorably with AAC’s M42000, when you factor in the flashhider/adapter needed for the AAC can (total weight 21.4 oz), and did not completely overwhelm the balance of the rifle. It balances right at the “heel” of the standard black AK-74m type plastic handguard with the suppressor attached. Without the can, it balances about 1/2" in fron of the magazine. [/ul]
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[ul][li]The Brevis’ length of roughly 5.5" is nice, since it only adds about 2" to the overall length compared to a '74 compensator.[/ul]
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[ul][li]The Brevis makes use of the spring loaded pin on the FSB to prevent it from unscrewing, so it has the one advantage of a quick detach can that interested me.[/ul]
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Overall I’m pleased and can’t wait to try it in our local multigun match.
These are the best pics I can do for now, since my interior lighting sucks. If someone wants, I can get some better pictures in daylight tomorrow at lunch.
You can’t really tell in the muzzle-on pic, but the “bore” of the can gets progressively smaller from the endcap to the blast baffle. I don’t have a tool to measure it at the blast baffle, but it seems consistent with the bore size of other .30 cal cans. The opening in the endcap is almost exactly .50"
The blast baffle is inconel, as reported by another user of this suppressor in his review at silencertests.com
I am surprised (pleasantly!) as to how short the can is. It looks great on your AK-101 clone. I have a 5.56 AK-101 clone, and soon will have a 5.45 AKS-74U clone, and a 7.62 AK-104 clone. This can would be perfect for these guns since they all share the 24mm threads.
Thanks for posting this, I didn’t even know of this can’s existence!
Yeah, mine’s an SLR-106FR with an Ultimak and TWS gen2 “dogleg” mount.
I found mounting the Aimpoint as far back as possible helped alleviate the muzzle heavy feel somewhat.
A trick I came up with to see what a suppressor would feel like before I bought one (what led me to the TWS and micro Aimpoint) was to find out the weight of the suppressor, take a loaded mag and add (tape to the side) or remove rounds until it’s close to the weight of the suppressor you’re considering, then duct tape it to the muzzle of your rifle. It’s ghetto, but it works.
I understand that these were a limited run, but if there’s enough demand I think Byron might be persuaded to make more.
I really recommend you contact Byron directly. He’s very personable and can give you a better idea of pricing, since it looks like they may have made some pricing changes recently.
A second, more extensive outing with the can has shown it to be a disappointment.
I have further tested my SLR-106/Brevis 7.62x39 and the performance was disappointing to say the least. I had a friend fire while I stood 100 yards away, with a building in between us. The SLR-106 with Brevis 7.62x39 mounted sounded more like a long-barreled shotgun firing birdshot. I have yet to compare it side-by-side with another can, but from memory, a Tac16 on an AR15 produces a significantly less noticeable report- more like a .22 pistol with louder bullet travel sound and impact.
A 3-4" fireball could be seen emitting from the endcap as it began to get dark near the end of the range session.
I discovered that the baffles are, in fact, not progressive: the blast baffle and next baffle are what you’d expect for a .30 can and the remaining baffles all have roughly .50" diameter openings. I imagine it would perform better with a 7.62 AK103-type AK, but with the smaller 5.56 it just doesn’t work well at all.
I spoke with Byron about the situation and he was quite sympathetic, but unfortunately stated that, due to the construction method used in the can, he can’t do anything to modify it (replace the .50" diameter baffles with .30 cal baffles or similar). Byron did make an attempt to make things right and was quite polite and understanding, but the only thing I was interested in was a way to get what I wanted without buying another product, paying another tax and waiting period, which seems can’t be done. He further offered to take the can back for what I payed him for it, though I’d still have to pay to have it transferred back. I’m considering this.
Unfortunately, six months of anticipation and over $1000 invested ending with a flop, knowing that remedying the situation is going to require writing this can off as a loss (or half loss, if I decide to send it back), another large sum of money and a six month wait, makes for a real let down.
Please allow me to be the first to express gratitude for your candor with this product.
It is indeed a shame it does not work very well. I would imagine that if you are seeing results such as this with a 16" 5.56mm, an 8.3" 5.45mm would be miserable.
Yeah. I bought the can and have since joined the ranks of the unemployed, so there’s no telling when I’ll be able to replace it. It was originally a decision between this or an AAC for the AR. I like shooting the AK more, so I went with the AK can. Pretty bummed out.
Too bad there isn’t a way to do a neoprene wipe on this can, I think it might help…then again I am not too sure if the wipe would last more than a round or 2…
sorry it is not working for you, one reason I have not purchased a can as I do not want it to be an expensive lesson. anyone have an idea how well this can works in the .308 config? I would like a .308/6.8/300blk can and was looking at the brevis because of its short length as I am not going to sbr a rifle.
I know it sucks hearing the words reload and AK in the same sentence, but would it be possible to load subsonics and try it out? Im sure your flash would diminish and the report would be reduced to more pleasant levels, doubt it would cycle though.
Ok, I’ve learned some things and need to clarify some others:
Sound suppressors are not usually efficient flash suppressors. I watched a video that showed a Gemtech Halo (a 5.56 can) mounted to a chinese .223 AK fired in daylight and saw flash from the end of the can. Comments from others confirm that flash suppression shouldn’t be among your list of expectations with a sound suppressor unless it is designed to to do that as well.
So, my concern over the flash from this can was unwarranted.
Delta P is great to work with. I spoke with Byron about my misunderstanding and disappointment and he was quite eager to see me satisfied. I’m going to perform a few more subjective tests beside another can both super and sub sonic and see if I can find satisfaction in what this can does do. If not, Byron offered to work with me to find an acceptable solution.
The issues that I’m experiencing are because of a misunderstanding/miscommunication about the capabilities of this can. My experience with this particular can shouldn’t be taken as a reflection of the overall quality of Delta P’s other offerings.
At the reference point (measured 90* to the muzzle) the Delta P cans seem to run middle of the road for suppression performance. However, when measured at the shooter’s ear, the performance is nearly on-par with higher-end cans. I don’t understand how this works, but Byron did mention that the cans were specifically designed to produce this result.
The main reason I’d choose a Delta P can is if I wanted a shorter-than-normal length with similar performance at the ear as a full-size can.
Their 308 cans seem to offer decent performance in a short package. They appear to be hearing safe at the ear.
