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 OCL Infinity 556K Front Cap Comparison (High, Medium, and Low Backpressure) |
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Originally Posted By bluedog82: https://www.ar15.com/media/mediaFiles/499242/IMG_1725_jpeg-3791714.JPGhttps://www.ar15.com/media/mediaFiles/499242/IMG_1726_jpeg-3791715.JPGhttps://www.ar15.com/media/mediaFiles/499242/IMG_1727_jpeg-3791716.JPGhttps://www.ar15.com/media/mediaFiles/499242/IMG_1728_jpeg-3791717.JPGhttps://www.ar15.com/media/mediaFiles/499242/IMG_1729_jpeg-3791718.JPG That’s just crazy. “Hey Claude, build me the best possible silencer possible.” |
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Originally Posted By KSPeacekeeper: The more I shoot this can, the more I like it. Same. One minor point of critique – I wish the blast chamber was just a bit longer maybe by an eighth or a quarter of an inch. I’ve been using Griffin muzzle devices and discovered that its just a hair too short for using with a hammer comp. I haven’t done the math, but I’m not certain it would accommodate a muzzle device long enough to do a pin and weld. Maybe I’m wrong about that but a little more room would offer greater flexibility. I got an extended taper mount adapter from Ecco machine that gives me the extra room I needed. |
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I love the swappable end cap system. The Helios is a meh suppressor, but being able to swap the end caps for different hosts makes it one of my go-tos I’m really looking forward to picking one of these up (and possibly the full size infinity down the road as well) |
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Originally Posted By dblazevich: I love the swappable end cap system. The Helios is a meh suppressor, but being able to swap the end caps for different hosts makes it one of my go-tos I’m really looking forward to picking one of these up (and possibly the full size infinity down the road as well) The Helios is worse than meh. It’s pretty bad. BUT the concept behind it is great. It’s one of those great ideas but poor execution things. The infinity 7.62 and 5.56 both take that idea and make it actually good |
| Just picked it up today, submitted last Thursday, approved this afternoon. Need to get a mount for it and remove a P&W for the rifle it will go on, a 14.5 SD. |
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Originally Posted By Ronnoc: Mine weighs 15.4 ounces with the end cap in, I thought it was supposed to be 14.5. I think it has something to do with the 3d printing process. I have three 3d printed cans, all are different than what's listed on the website |
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Originally Posted By AndrewKing: The listed 14.5 oz is the bare suppressor body with no end caps or mounts installed Thanks! Guess I should have tried that!  Looking forward to trying it out, need to see if I want the higher flow end cap. Do appreciate you and other industry people posting with the knowledge and insights, thanks!Was wondering as my Rhino X came i heavier. |
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There’s no weighing standards. Some manu’s weigh with no rear mount or front EndCap, some weigh with both, some only with front endcap. Even within the same Manu there’s been lack of consistency. And sometimes they’re just flat-out wrong, in any configuration. I’ve got 6 cans inbound atm, it’ll be fun weighing each. Even funner is when Manus make internal changes to the same can and the weight changes. I’ve got an early Omega300 and then did a BOGO years later and got 2 more and the 2 newer ones are significantly lighter weight than my older one, none of which match the listed weight on SiCo’s website. That reminds me - with the $200 stamp thing gone, selling / transferring suppressors can make a little more sense now. I’ve got 2 brand spanky new SiCo Omega300s I might sell. Hmmmm. |
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Originally Posted By AndrewKing: The listed 14.5 oz is the bare suppressor body with no end caps or mounts installed Originally Posted By AndrewKing: Originally Posted By Ronnoc: Mine weighs 15.4 ounces with the end cap in, I thought it was supposed to be 14.5. The listed 14.5 oz is the bare suppressor body with no end caps or mounts installed I think this misunderstanding came up on Reddit a few months ago or whenever the can launched. It doesn't seem like it would be too taxing to add some truth in advertising to your site, might look like this: 
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Originally Posted By Gtscotty: I think this misunderstanding came up on Reddit a few months ago or whenever the can launched. It doesn't seem like it would be too taxing to add some truth in advertising to your site, might look like this: https://i.postimg.cc/MTkcxNTh/Screenshot-20260716-071428-2.jpg “Truth in advertising” The entire industry plays the same game. It’s aggravating for sure but it is what it is. Same for testing 100 different kinds of ammo with 10 different barrel lengths and picking the lowest shot and calling that the dB level. If you’re worried that much about an oz take a shit the morning before you go shoot |
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I don’t directly but my griffin taper mount hammer comp bottoms out on the blast baffle just barely preventing seating. I think griffin has info on the length of all their muzzle devices available that you could cross compare based on that. ETA per Griffin’s web page the Hammer Comp is 1.94” OAL. |
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@KTM300XCW I had a spare ASR mount and brake i tried it on and it fit, same with FH. I think it it is almost touching the blast baffles but not quite. The base of the mount to the tip of the longest FH tine is a hair short of 1.5" and blast chamber is just shy of 1.75 ", so about a quarter inch of clearance. Whether that is okay or not would be a question for Andrew. Attached File Attached File |
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Originally Posted By Ronnoc: @KTM300XCW I had a spare ASR mount and brake i tried it on and it fit, same with FH. I think it it is almost touching the blast baffles but not quite. The base of the mount to the tip of the longest FH tine is a hair short of 1.5" and blast chamber is just shy of 1.75 ", so about a quarter inch of clearance. Whether that is okay or not would be a question for Andrew. https://www.ar15.com/media/mediaFiles/73248/5206_jpg-3796210.JPG https://www.ar15.com/media/mediaFiles/73248/5207_jpg-3796211.JPG I think 1/4” should be plenty. 3 prongs are notoriously hard on blast baffles but that’s just the nature of the beast…it is Haynes 282 after all. |
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Originally Posted By Ronnoc: @KTM300XCW I had a spare ASR mount and brake i tried it on and it fit, same with FH. I think it it is almost touching the blast baffles but not quite. The base of the mount to the tip of the longest FH tine is a hair short of 1.5" and blast chamber is just shy of 1.75 ", so about a quarter inch of clearance. Whether that is okay or not would be a question for Andrew. https://www.ar15.com/media/mediaFiles/73248/5206_jpg-3796210.JPG https://www.ar15.com/media/mediaFiles/73248/5207_jpg-3796211.JPG Thank You for taking the time to try this for me. I really appreciate it. Perhaps Andrew will see this and chime in. I guess worst case I will just modify a 3 port brake to a 1 port brake to shorten it up some. I've already done that for one of my other cans. It's easy to do with an angle grinder. |
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Originally Posted By bluedog82: I think 1/4” should be plenty. 3 prongs are notoriously hard on blast baffles but that’s just the nature of the beast…it is Haynes 282 after all. Given that I shoot mostly suppressed, I would probably use the brake so not to be as hard on it as the 3 prong FH. |
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Thanks for putting this video together. I'm looking forward to the full test. |
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Originally Posted By AndrewKing: “Truth in advertising” The entire industry plays the same game. It’s aggravating for sure but it is what it is. Same for testing 100 different kinds of ammo with 10 different barrel lengths and picking the lowest shot and calling that the dB level. If you’re worried that much about an oz take a shit the morning before you go shoot This sounds a lot like "everyone one else is duping the customer so I have to too". I thought it was an omission at first, but certainly sounds intentional, that's kind of slimy my dude. CAT's weights include their DT mount, (verified on my scale for my Noah Ti). And DA is pretty transparent in their weights with standard configs, it seems like while some folks are playing games, others are being a bit more honest with their customers.  Advertising your can weights in a configuration that it could never be used in, without a mount or end end cap (which it ships with) AND not mentioned that tidbit on the product page is deceptive marketing, regardless of whether some other manufacturers are also being deceptive or not, you don't have to race to the bottom. |
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Originally Posted By KTM300XCW: Thank You for taking the time to try this for me. I really appreciate it. Perhaps Andrew will see this and chime in. I guess worst case I will just modify a 3 port brake to a 1 port brake to shorten it up some. I've already done that for one of my other cans. It's easy to do with an angle grinder. 1/4 inch is plenty. Absolutely zero concerns about that. As long as it’s not touching run it. The blast chamber is plenty roomy and should accommodate 99% of mounts and muzzle devices no problem |
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| Powerful, OCL! Love to see it. Very interesting results between the end caps on the Mk18. |
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Originally Posted By KTM300XCW: Given that I shoot mostly suppressed, I would probably use the brake so not to be as hard on it as the 3 prong FH. Originally Posted By KTM300XCW: Originally Posted By bluedog82: I think 1/4” should be plenty. 3 prongs are notoriously hard on blast baffles but that’s just the nature of the beast…it is Haynes 282 after all. Given that I shoot mostly suppressed, I would probably use the brake so not to be as hard on it as the 3 prong FH. Hopefully only a minor derail: Would “3 prong FH are hard on blast baffles” still be true on an Infinity 762 if mounted to a 3-prong AAC 51t setup? Or was the same, but on a 5.56 out of the bigger can? Intending to pick my can up from jail this weekend, and I don’t want to start my own thread to address this one question. |
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Originally Posted By Seven-Shooter: Hopefully only a minor derail: Would “3 prong FH are hard on blast baffles” still be true on an Infinity 762 if mounted to a 3-prong AAC 51t setup? Or was the same, but on a 5.56 out of the bigger can? Intending to pick my can up from jail this weekend, and I don’t want to start my own thread to address this one question. Originally Posted By Dale5150: IMHO a 3 prong fh will always be harder on the blast baffle that a brake. 3/4 prongs are some of the worst muzzle devices for wear. But remember that the military uses them pretty much exclusively. Are you shooting high round count days, short barrels, or FRTs? If so, your blast baffle might show significant wear in only thousands of rounds instead of tens of thousands. But let’s be real here, the Infinity 556K is a super durable can and is going to last far longer than most people will ever take it. |
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PEW results came out today. Really pleased to see that it scored best with the medium pressure 3 hole endcap. In 2026 with design and manufacturing I think a can designed around an AR should be optimized for low back pressure. I'm not interested in a quiet full back pressure can these days. The Otter boys did their homework on this one. |
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Originally Posted By bluedog82: 3/4 prongs are some of the worst muzzle devices for wear. But remember that the military uses them pretty much exclusively. Are you shooting high round count days, short barrels, or FRTs? If so, your blast baffle might show significant wear in only thousands of rounds instead of tens of thousands. But let’s be real here, the Infinity 556K is a super durable can and is going to last far longer than most people will ever take it. Originally Posted By bluedog82: Originally Posted By Seven-Shooter: Hopefully only a minor derail: Would “3 prong FH are hard on blast baffles” still be true on an Infinity 762 if mounted to a 3-prong AAC 51t setup? Or was the same, but on a 5.56 out of the bigger can? Intending to pick my can up from jail this weekend, and I don’t want to start my own thread to address this one question. Originally Posted By Dale5150: IMHO a 3 prong fh will always be harder on the blast baffle that a brake. 3/4 prongs are some of the worst muzzle devices for wear. But remember that the military uses them pretty much exclusively. Are you shooting high round count days, short barrels, or FRTs? If so, your blast baffle might show significant wear in only thousands of rounds instead of tens of thousands. But let’s be real here, the Infinity 556K is a super durable can and is going to last far longer than most people will ever take it. Awesome, thank you! I’m going to guess that for an OCL Infinity 762 (non-K), for non-NFA barrels on a .308 Bolt or a 5.56 bolt or semi (no FRT), that I’ll be fine for a long time. And agreed that OCL does their research! |
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Originally Posted By bluedog82: Nope, interesting. Originally Posted By bluedog82: Originally Posted By UndrGrndPrdcts: Is anyone noticing a lot of pinging? Using the brake supplied in the elite kit and it's pinging like a mother. Other than that it sounds great and I like the performance. Nope, interesting. Why would there be a difference? |
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Originally Posted By UndrGrndPrdcts: @AndrewKing any reason why this would be pinging like this? Did I do something wrong? It sounds like a tuning fork. As much as I hate to say it, I don’t know. We haven’t seen any pinging in testing and you’re the first person I’ve seen say anything about it. I know they will ping off the gun when not firing if you tap them in a specific location but it does not translate to pinging when shooting. If you want to send it in for us to look at it and investigate we gladly will! I’m kind of curious myself. You can email [email protected] and they’ll get you a form to fill out. |
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Originally Posted By AndrewKing: As much as I hate to say it, I don’t know. We haven’t seen any pinging in testing and you’re the first person I’ve seen say anything about it. I know they will ping off the gun when not firing if you tap them in a specific location but it does not translate to pinging when shooting. If you want to send it in for us to look at it and investigate we gladly will! I’m kind of curious myself. You can email [email protected] and they’ll get you a form to fill out. Originally Posted By AndrewKing: Originally Posted By UndrGrndPrdcts: @AndrewKing any reason why this would be pinging like this? Did I do something wrong? It sounds like a tuning fork. As much as I hate to say it, I don’t know. We haven’t seen any pinging in testing and you’re the first person I’ve seen say anything about it. I know they will ping off the gun when not firing if you tap them in a specific location but it does not translate to pinging when shooting. If you want to send it in for us to look at it and investigate we gladly will! I’m kind of curious myself. You can email [email protected] and they’ll get you a form to fill out. I'm going to do a little more testing first before I resort to sending it to you guys. It doesn't seem like there is anything wrong with the can itself. I'm going to double check and make sure everything is retorqued and it's fully seated on the rearden brake. If I had to guess I'd say it's either an incomplete seating on the rearden taper (not tight enough maybe), or something with the endcap resonance/loose endcap. Any thoughts on tightness/torque values of the various attachments? Maybe some testing would produce a ping/vibration. |
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Picked up a 556K the other day on a 4473, and put on ny 18" Hellion so far. Very happy with it, on my first time out with it. Attached File |
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Originally Posted By 46and_22s: Any plans for a titanium version down the road? Looking for a low back pressure, decently light 6mm compatible option for a 12.5 5.56 and 6arc. Check out the Carson. it’s a licensed Infinity core. |
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Originally Posted By AndrewKing: Yes and no barrel length restrictions We tested all the way down to a 12.5” barrel belt fed and a 4.75” barrel AR both in full auto no issues. You won’t hurt one. Originally Posted By AndrewKing: Originally Posted By TGWLDR: Full auto rated? Any barrel length restrictions? @AndrewKing Yes and no barrel length restrictions We tested all the way down to a 12.5” barrel belt fed and a 4.75” barrel AR both in full auto no issues. You won’t hurt one. Thanks for responding man, much appreciated. I'm down for one. 
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