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OpsINC, AE, Otter Creek reflex silencers (Otter Creek recce carbine build) Login/Join 
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Does anyone here have experience with these silencers? I have been very interested in one for a little while now. The weekly silencer writer on TFB consistently refers to the AEM5 as the quietest 5.56 silencer he's ever used (granted it's on a MK12 setup; not something shorter). I think the reflex aspect is a cool way to maximize internal volume and create disruptive flow patterns, all while maintaining a deceptively long barrel; the penalty is, of course, weight. The build in my mind's eye is a mid-length gas gun, with just enough barrel past the gas block to accommodate the collar and mount for the can; I think that'd work out to be a ~14" barrel, with the can probably bringing it to ~20". The Otter Creek OCM5 is lighter than the Ops and Allen silencers, which would mitigate that weight issue a bit; considering I am not building a "clone" gun, I would be primarily considering the Otter Creek, to save that weight and some money.

Does anyone on here have any opinions on these silencers? My bottom line goal is to make a very quiet 5.56 gun that is still handy enough to not be better suited to a DMR role.

This message has been edited. Last edited by: KSGM,
 
Posts: 1159 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
A man of few words
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I just took the leap and have an OCM5 waiting on a Form 3 to my local dealer. Mine will be going on a PRI MK12 Mod H. I went back and forth between the OCM5 and AEM5, but everything that I read pushed me to go with Otter Creek. It's lighter, is said to have less blow back, and is also supposed to be quieter than the originals due to an updated baffle design. Like you, I'm not concerned about the clone aspect and only want the best performance.

Your build plans sound more NSW Reece-ish to me which would be an awesome setup. I'm considering building my own interpretation of that at some point using the Allegheny Arms tapered gas block now that I have this can on the way.

https://www.dwilsonmfg.com/All...as-blocks_p_133.html
 
Posts: 986 | Location: Georgia | Registered: September 09, 2007Reply With QuoteReport This Post
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That tapered gas block is slick, but I am a fan of PRI flip-up sight gas blocks, and use them on other guns already; I intend to use one on this prospective build too, so I'll need to use a collar. Considering PRI's involvement in the MK12, it seems they'd do well to integrate that taper into a version of their FSGB; that'd be cool.

After googling the NSW RECCE rifle you mentioned, I can tell you my intent is to create something hopefully lighter and a bit shorter than that. My build will not be free-floated either; more of a focus on near-mid range with good suppression, than mid-long range and accuracy.
 
Posts: 1159 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
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OCM5 is waiting on it's form3. Barrel is on the way to ADCO for cutting, rethreading, contouring, collar install, hider pin/weld. Other build pieces are either on the way or already standing by. I expect the silencer to arrive at LGS about the time I get the barrel back. Ordered a BRT gas tube; I asked for their recommendation, based on the specs and intent of the build. I am optimistic about the gun, but I've been wrong enough times before, that it is a cautious optimism. Even though the components list be outwardly impressive, it's no indication the finished product will run as desired. The functional pieces are as follows; muzzle to butt.
OCM5 silencer
Smith Vortex Ops Inc hider pin/weld
14.5" FN button rifled, chrome lined barrel
PRI gas block
BRT gas tube
LMT enhanced BCG
H2 buffer and carbine spring

I will also be using a PRI gas buster charging handle and SF M85 rail. Though not "functional" pieces, they do affect performance. I have found the gas buster to be effective on my other guns, and I like the low profile of the SF rails on my other guns. The use of this rail doesn't free float the barrel but, for my application, I have found accuracy more than acceptable, with my carbine gas guns, utilizing the M73 rail.

It'll all be on a MARS lower with a Specter on top. Cautiously optimistic.
 
Posts: 1159 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
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Can arrived at LGS today. Pretty light, considering it's length. The reflex portion is not as long as I imagined. I'd say you get between two and three more baffles worth of internal volume out of the aft portion of the silencer. I did change my mind to a brake, as opposed to the Vortex mount. The brake likely serves to encourage gas flow into the rear section of the can, where the hider wouldn't. My preference always dictates a hider, but, this gun being permanently suppressed, combined with the symbiotic relationship of brake and can, I opted to use the brake.
 
Posts: 1159 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
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The OCM5 sounds interesting. My AEM5 was recently let out of jail, still haven’t fired it, but the first thing I noticed was it’s a pig, considering it’s not really QD. No big deal as I’m not huffing it through the mountains. Had the OE been available when I purchased the AE, I might have considered it, despite the higher cost of the OE for the little bit of weight savings.
 
Posts: 1821 | Location: TX | Registered: October 28, 2010Reply With QuoteReport This Post
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The OCM5 is 15.93oz, according to my scale.
 
Posts: 1159 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
What is the
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On paper, my AEM5 is 21oz. I’ll have to weigh it later. So at just over $100 to save 4oz may be worth it. The AE is essentially a clone, for better or worse, while the OC is the upgrade. Weight and blowback being considered.

Edited to correct: on my kitchen scale it weighed 19.8oz. Take it with a grain of salt.

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Posts: 1821 | Location: TX | Registered: October 28, 2010Reply With QuoteReport This Post
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16.02 is the weight of the OCM5, according to the manufacturer. Maybe they err on the side of caution.
 
Posts: 1159 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
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I have an OPS 12th in 30. Its heavy but the tone is fantastic and it quiets my SCAR down quite nicely. It also has very low poi shift. The mounts can be a bit of a PITA. I suggest getting a one piece reflex brake that has the integral collar. Also some of the muzzle devices are long enough to pin and weld on a 14.5. In summary great, crazy durable can for what it is nd when I bought it. I am looking for a can with swappable end caps to run 556 which it does fine with but isn't incredible due to the wider bore.
 
Posts: 2826 | Location: Pnw | Registered: March 21, 2009Reply With QuoteReport This Post
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I got the gun together. Was able to put one mag through it so far. May be a bit more gas in the face than anticipated. I am hoping it will be reduced a little bit when I install the H2 buffer that I thought was already in the lower (turns out it had an H in it). Hard to judge the effectiveness of the can, when it comes to sound reduction, without having some side-by-side comparisons standing by. I know it didn't hurt my ears without ear protection (I know it actually does hurt my ears). It is refreshing to hear the round hit the steel with a bit more authority; the longest AR I've messed with in the last while is 11.5". Initial impressions are telling me the OpsINC-style cans really aren't worth the...Length? Weight? Price? I formed those as questions because the OCM5 doesn't add any OAL that wouldn't be there with a conventional can; nor weight; and it isn't exceptionally expensive. So, I dunno. One could argue that the weight is close to something like RC2, which has much more to offer, when it comes to hard use performance. So, the weight is arguably a con. The gun is certainly longer than my current go-to, but my attitude has shifted in favor of ballistic performance of late, so that's a compromise I am willing to make. It's certainly quieter too. Unfortunately, I have no comparable builds that can host other cans, to enable a side-by-side comparison, to gauge sound reduction performance. Another potential con is the lack of a latch in the silencer attachment method. This design doesn't have a self-tightening aspect, like an OSS, so I feel persistent tightness checking is necessary. I may create and test a crude redundant stop of sorts. As a tangent to the Colt 6940 thread, concerning length of the handguard: it is refreshing to have a smidge more space, with the drop-in mid length rail. I am able to use a Unity TAPS switch for my light and laser, which has been neglected in a drawer for months, because it wouldn't fit on my other carbines. I'll update this thread, as I get more time behind the gun. I am going to try to shoot a few rounds with the H2 today. I am considering the build a sort of "compact recce" or "recce carbine", as opposed to recce rifle. It was built to potentially take over as my go-to general purpose carbine though. If the Marines in Fallujah managed to whoop ass in buildings with M16s, I can likely make due with a suppressed 14.5".
 
Posts: 1159 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
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Fired a few more diagnostic rounds this morning. I opted for BRT's recommendation, on the gas port, based on my rifle's specs. The gun will be suppressed all the time. Based on the mild gas irritation I experienced, in my initial firing of the setup, I suspected I may be able to go a bit smaller on the port. I could, but I don't think I will. I ran three rounds each of M193 and M855 without the silencer this morning, the idea being that, if it functioned without the can, I could certainly go smaller on the porting. It did function, but only just. It will cycle both rounds, but will not lock back on empty. Considering my practical mindset behind the build, I am going to leave it with the .070" they sent. If my silencer were to experience a catastrophic event, I can still employ the weapon to some degree of efficacy. I suspect that, if I swapped the LMT carrier out for a regular one, the gun would lock back on empty without a can. So, for this particular gun, I'll opt for a perhaps slightly over-gassed condition in it's intended configuration, in the name of extreme reliability with the can, and worst-case performance ability without it.
 
Posts: 1159 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
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After some more time behind the gun, I don't think the lack of a latch mechanism on the silencer is anything to worry about. It seems the taper surfaces hold it pretty solidly; I have yet to have it loosen up on me. As mentioned in the flash signature thread, this setup has very good flash performance, which is a happy accident. I have yet to get the gun properly zeroed, as I had to switch to a different rear iron sight, after encountering interference with my night-time optics setup. I hope to square away the zero, and shoot for accuracy, sometime in the next week or so. The first time I set out to zero the gun, I noted some odd fliers (one out of a five shot group). I hope this was a result of poor performance on my part; we'll see.
 
Posts: 1159 | Location: Northeast GA | Registered: February 15, 2021Reply With QuoteReport This Post
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