User Panel
Posted: 3/16/2014 2:38:14 AM EDT
[Last Edit: Lancelot]
When discussing the Mk 18 / CQBR program, we can divide the history and discussion in to two distinct categories: 1) The weapon system itself / upper receiver supplied and 2) the group of accessories deployed on said weapon systems (SOPMOD).
---------- Mk 18 Mod 0 / CQBR The M4 carbine and M16 are not ideally suited for all missions, so it was proposed that the modularity of the M16 series would allow a user to replace the upper receiver of an existing weapon with one more suitable to the task. One of two proposed special mission receivers that were planned for inclusion into the SOPMOD Block II kit, the CQBR has taken off on its own. Like the proposed Special Purpose Receiver, the Close Quarters Battle Receiver has been more or less taken on by the Naval Surface Warfare Center, Crane Division (often referred to as NSWC-Crane or just "Crane") as its own project following the CQBR's removal from the SOPMOD program. Just as the Special Purpose Receiver morphed into the Special Purpose Rifle, and was type-classified as Mk 12 Mod 0/1, the complete CQBR-equipped carbine has been type-classified as the Mk 18 Mod 0. The purpose of the CQBR remains to provide operators with a weapon of submachine gun size, but firing a rifle cartridge, for scenarios such as VIP protection, urban warfare, and other close quarters battle (CQB) situations. The CQBR is designed to provide improvement over previous AR-15/M16-type weapons in this category. The CQBR is usually issued as a complete weapon system, and not just an upper receiver. The CQBR was once only available to Naval Special Warfare units, but the Mk 18 Mod 0 has become general issue for Visit, Board, Search, and Seizure (VBSS) missions and, as of 2006, for NCIS agents deploying to active combat zones.[citation needed] The Mk 18 is also used by the Coast Guard's Tactical Law Enforcement Teams, Maritime Safety and Security Teams, and Maritime Security Response Team and the United States Navy's Explosive Ordnance Disposal (EOD) Operators. Wikipedia has a good article with sources on the original CQBR/Mk 18 Mod 0 and its development. ---------- SOPMOD The SOPMOD Program Management Office at NSWC Crane, IN, provides standardized, versatile weapons accessories to meet needs across SOF mission scenarios. These accessories increase operator survivability and lethality by enhanced weapon performance, target acquisition, signature suppression, and fire control. The CQBR itself was originally part of the SOPMOD program as an accessory replacement upper receiver for the M4. However it was eventually separated out into its own project. SOPMOD accessories for the M4/CQBR originally included things like the KAC RIS/RAS, SOPMOD stock, KAC M4QD suppressor, AN/PEQ-2 illuminator/laser, ECOS-N red dot, ACOG, etc The SOPMOD program has gone through multiple minor and major evolutions throughout its lifetime. The most significant is commonly defined as "Block II" and included the introduction/replacement of accessories that met the updated needs of operators. The most visually significant "Block II" accessory is probably the replacement of the KAC rail/FSB with the Daniel Defense RIS II free float rail with low-profile gas block. Other updates include things like the Surefire SOCOM sound suppressor, EOTech RDS (553/SU-231 & EXPS 3-0/SU-231a), LA-5/PEQ ATPIAL, etc ---------- Link to docs and photo albums Presentation on CQBR from Crane Operator's Manual for Mk 18 Mod 0 SOPMOD Program Overview presentation from Crane Photo Album of Mk 18 Mod 0 Photo Album of CQBR with SOPMOD Block II accessories ---------- Because of the long history of both the CQBR/Mk 18 and SOPMOD programs, it's common to find weapons with various mixed configurations in the field, all depending on what time and unit the weapon system belongs to. Below are a few examples with descriptions to illustrate this. Example of a Mk 18 Mod 0 in as-issued configuration including: M16A1 surplus lower receiver, SOPMOD buttstock, KAC RIS, KAC M4QD flash hider, Aimpoint Comp M2 in Wilcox mount, LMT rear fixed sight, CQD rear sling plate. NSW Operator CQBRs with original SOPMOD accessories including KAC M4QD sound suppressor and AN/PEQ-2 IR Illuminator/Laser. Member of a Combat Camera team with a CQBR with KAC RAS and M4QD flash hider but with other updated accessories from the "Block II" SOPMOD kit including SU-231a (EOTech EXPS 3-0), EOTech G33 Magnifier, LA-5/PEQ ATPIAL, Insight WMX-200. Good example of "early" CQBR with SOPMOD Block II accessories including SU-231 (EOTech 553) and SU-233 (Insight M3x weaponlight). Example of a more "modern" CQBR with SOPMOD Block II accessories including the updated SU-231a (EOTech EXPS 3-0) and Insight WMX-200 weaponlight. Many times certain configurations are common within certain branches/groups. Here a Marine Raider is seen with a CQBR with an AN/PEQ-16 (USMC issued vs. the LA-5/PEQ SOCOM issued ATPIAL) and KAC NT4 suppressor (vs. the current Surefire SOCOM suppressor). ---------- Building a clone If you're interested in building a "clone" of a Mk 18 or CQBR equipped M4A1, here is a basic parts list to use as a guide and get you started. This list is not exhaustive and see the * note above regarding personalized accessories. | Mk 18 Mod 0 | M4A1 CQBR Block I | M4A1 CQBR Block II Lower Receiver | Mil-spec forged A1 | Mil-spec forged A2 | Mil-spec forged A2 Stock | Gen 1 SOPMOD (Black) | M4, CAR, SOPMOD, CTR & others | M4, CAR, SOPMOD, CTR & others Pistol Grip | A1 | A2, ERGO & others | A2, ERGO & others Rear Sling Plate | CQD | CQD | CQD Upper Receiver | Mil-spec forged M4 profile | Mil-spec forged M4 profile | Mil-spec forged M4 profile Barrel | 10.3" | 10.3" | 10.3" Rail | KAC RIS | KAC RAS | DD Mk18 RIS II (FDE) Rear BUIS | LMT Fixed | LMT Fixed, MATECH, & others | MATECH, KAC 300m, & others Front Sight | A2 FSB | A2 FSB | KAC 99051 BUIS (Taupe) Front Sling Attachment | FSB Sling Swivel | FSB Sling Swivel | CQD Muzzle Device | KAC M4QD | KAC M4QD | SureFire FH-556-RC Supressor | None | KAC QDSS NT4 | SureFire SOCOM556-RC (FDE) LAM | None | PEQ-2 | LA-5 Weaponlight | SureFire M962 | SureFire M952, M962 | Insight M3X (Tan), Insight WMX200 (Bronze) Optic | Aimpoint Comp M2 in Wilcox Mount | Aimpoint Comp M2 in QRP Mount, ACOG | EOTech 553 (Tan), EOTech EXPS3-0 (Tan), ELCAN 1-4x (FDE) ---------- Link to previous threads Previous Mk 18 / CQBR Thread Part I Previous Mk 18 / CQBR Thread Part II |
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Originally Posted By Kidnap_44: I saw this a few weeks ago. Thought it over, and said, nah, not now... But that price... I had to. You all made me do it. Just placed the order for a tan RC 2 minutes ago. My first can! View Quote On another note does anywhere have the KAC taupe FS in stock? My googlefu is showing everyone out of stock. For a block II with an EOTech what is correct for the rear BUIS? The Knights 0-300 or 200-600. Micro or not? |
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Originally Posted By AR_Marv: Bought my first from them a couple weeks ago too! Unless you're gonna hard core and get the 4 prong AU has the best price on the SF3P that I could find too. $89 shipped. On another note does anywhere have the KAC taupe FS in stock? My googlefu is showing everyone out of stock. For a block II with an EOTech what is correct for the rear BUIS? The Knights 0-300 or 200-600. Micro or not? View Quote CD |
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De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15&16' Afganistan: 09,10,11',14'&17' |
Originally Posted By Dobs013: I feel your pain. I did the same thing yesterday with this thing. Got home and was like, what am I gonna do with this? I feel better knowing I’m not the only one that does that https://i.imgur.com/7jMOOFQ.jpg https://i.imgur.com/bgJnTws.jpg Guess I’m building a mod 0 View Quote If you decide you don’t want it I might take it off your hands if it’s the carbine length. Been thinking about building something with one of those. |
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Originally Posted By Combat_Diver: Black are also kosher. I've installed many as replacements for lost Taupe models. Both have the same NSN in the system. Get them both when I reorder. KAC 0-300 were early block I sights. Current block II would be a black KAC 600 (non Micro). Non marked for Army but Marines need theirs to say "USMC" on them. Other BUIS would be the Matech. CD View Quote |
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Originally Posted By MILSPEC556: You dun messed up sir. Send to me for proper disposal. (Yes the KAC M4 RIS is a desirable rail, and I would not regret buying it) I miss mine quite a bit. Its a fairly historic rail in the "hardcore clone game" god I sound like a douche saying that. View Quote |
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Originally Posted By Combat_Diver:
Someone here was asking about the IUD labels. Seen square, rectanglar and circular. Here's a circle one getting replaced with the new rectangle one. https://www.AR15.Com/media/mediaFiles/32677/IMG_4651_rz-403629.JPG https://www.AR15.Com/media/mediaFiles/32677/IMG_4650_rz-403646.JPG CD View Quote |
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NRA Life Member USN Retired |
Originally Posted By krdt:
At that price the question isn't should you buy a SOCOM RC, the question is how many should you buy, lol. If I had the extra scratch I would buy a second one. View Quote |
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NRA Life Member USN Retired |
Originally Posted By Dobs013: I feel your pain. I did the same thing yesterday with this thing. Got home and was like, what am I gonna do with this? I feel better knowing I’m not the only one that does that https://i.imgur.com/7jMOOFQ.jpg https://i.imgur.com/bgJnTws.jpg Guess I’m building a mod 0 View Quote |
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Not to get off topic too much but the out of production KAC FF RAS in all flavors are coming back at SHOT.
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Originally Posted By 78Staff:
It's temping to pick up a 2nd one at that price, as I am always swapping mine back n forth from my MK18 to my M4, but I really should get a Thunderbeast first for my LR. :) View Quote I don’t have the scratch right now to buy a can just because it completes a clone, so I’m trying to decide which direction to go. Just curious if clone correctness is what drives most of the guys/gals in here to the RC. |
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Originally Posted By smitty_007:
I’m sure it’s been asked before in here, but is clone correctness the main reason you all grab the RC over other cans (like the Saker, SpecWar, Sandman, etc.)??? I don’t have the scratch right now to buy a can just because it completes a clone, so I’m trying to decide which direction to go. Just curious if clone correctness is what drives most of the guys/gals in here to the RC. View Quote View All Quotes View All Quotes Originally Posted By smitty_007:
Originally Posted By 78Staff:
It's temping to pick up a 2nd one at that price, as I am always swapping mine back n forth from my MK18 to my M4, but I really should get a Thunderbeast first for my LR. :) I don’t have the scratch right now to buy a can just because it completes a clone, so I’m trying to decide which direction to go. Just curious if clone correctness is what drives most of the guys/gals in here to the RC. |
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Practice, the master of all things. - Augustus
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With all the G love lately, I guess that Garand Thumb was right.
https://youtu.be/AADEn4OBc34 |
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If U can't Truck It F!@k It!
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This might be an odd request, I am finishing up my mod 0, and installing the KAC RAS. But I feel like it’s not Mating up to the receiver entirely? Could someone post a close up pic of the RAS where it mates up to the delta ring? Possibly a side and top view?
I’d really appreciate it |
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Originally Posted By rochelieux:
This might be an odd request, I am finishing up my mod 0, and installing the KAC RAS. But I feel like it’s not Mating up to the receiver entirely? Could someone post a close up pic of the RAS where it mates up to the delta ring? Possibly a side and top view? I’d really appreciate it View Quote |
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Colt all the shit!
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Originally Posted By MILSPEC556:
Hang the rifle muzzle down when you install the top rail of the RAS. Lets just say, the metal hook inside the RAS likes to get caught on the wrong side of the barrel nut. Once it is secured in the correct position, then tighten the screw down. View Quote View All Quotes View All Quotes Originally Posted By MILSPEC556:
Originally Posted By rochelieux:
This might be an odd request, I am finishing up my mod 0, and installing the KAC RAS. But I feel like it’s not Mating up to the receiver entirely? Could someone post a close up pic of the RAS where it mates up to the delta ring? Possibly a side and top view? I’d really appreciate it |
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Practice, the master of all things. - Augustus
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Really appreciate it fellas. Looks like I had it right the first time. It was that gap that was throwing me off. I assumed the delta ring would come closer to the rail section
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Originally Posted By JSchell1309: Tried to grab a few clear ones below. Let me know if you need another angle. http://i.imgur.com/Cayfek7.jpg http://i.imgur.com/jeX1ALd.jpg View Quote |
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Originally Posted By rochelieux:
Really appreciate it fellas. Looks like I had it right the first time. It was that gap that was throwing me off. I assumed the delta ring would come closer to the rail section View Quote Mine was really tight in the delta ring so I gave the ring a few smack with a soft face hammer from behind to seat on those tapers better. |
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Originally Posted By krdt:
For me, clone correctness certainly played a part, but it's also a good can at a reasonable price either way. It's sort of a win-win situation... quality can at a fair price and it just so happens to be clone correct choice? Where do I sign up! It's not like you're thinking, "Man, if it weren't for the clone game I wouldn't touch this POS with a ten foot pole." There are certainly clone parts like that *cough* M3X *cough*, but I don't think the RC even remotely falls into that category. View Quote View All Quotes View All Quotes Originally Posted By krdt:
Originally Posted By smitty_007:
Originally Posted By 78Staff:
It's temping to pick up a 2nd one at that price, as I am always swapping mine back n forth from my MK18 to my M4, but I really should get a Thunderbeast first for my LR. :) I don't have the scratch right now to buy a can just because it completes a clone, so I'm trying to decide which direction to go. Just curious if clone correctness is what drives most of the guys/gals in here to the RC. |
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NRA Life Member USN Retired |
Originally Posted By 78Staff:
Thanks CD - I'm getting ready to order a couple labels from Carolina - did the MK12's ever have labels, or only the MK18's/M4's etc... Last Mk12 I handled was well before the labeling. All had been withdrawn before I became an armorer. So, honestly don't know. CD View Quote View All Quotes View All Quotes Originally Posted By 78Staff:
Originally Posted By Combat_Diver:
Someone here was asking about the IUD labels. Seen square, rectanglar and circular. Here's a circle one getting replaced with the new rectangle one. https://www.AR15.Com/media/mediaFiles/32677/IMG_4651_rz-403629.JPG https://www.AR15.Com/media/mediaFiles/32677/IMG_4650_rz-403646.JPG CD Last Mk12 I handled was well before the labeling. All had been withdrawn before I became an armorer. So, honestly don't know. CD |
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De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15&16' Afganistan: 09,10,11',14'&17' |
We're your friends. We're not like the others.
USA
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Just out of curiosity, what's the going rate for Surefire 4P flash hider/suppressor mounts these days? New and/or used.
ETA - I ask because I have two I think I'm going to get rid of. |
Too weird to live. Too rare to die.
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Originally Posted By Conspiro-Agnew:
Just out of curiosity, what's the going rate for Surefire 4P flash hider/suppressor mounts these days? New and/or used. ETA - I ask because I have two I think I'm going to get rid of. View Quote |
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Originally Posted By krdt:
The current DD 10.3" with .070 gas port is your best bet IMO. New DD 10.3s show up in the EE fairly often at good prices from people parting out Mk18 SOCOM URGs. Otherwise, BA just released a CHF 10.3", but I'm not certain the gas port size. View Quote View All Quotes View All Quotes Originally Posted By krdt:
Originally Posted By Core:
Can someone recommend a CHF 10.3-10.5" barrel for my next build, appreciated. TIA |
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Originally Posted By JSchell1309:
Haven't seen these posted yet. Guy on Reddit posted his buddies deployed CQBR with a personal Vortex Razor AMG holographic sight on it. Thread 1 Thread 2 https://i.redd.it/3krqd297yt801.jpg https://i.redd.it/6qjwnjgxb8901.jpg View Quote love it. |
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Originally Posted By HaveBlue83:
the quintessential "we are deployed" picture. love it. View Quote View All Quotes View All Quotes Originally Posted By HaveBlue83:
Originally Posted By JSchell1309:
Haven't seen these posted yet. Guy on Reddit posted his buddies deployed CQBR with a personal Vortex Razor AMG holographic sight on it. Thread 1 Thread 2 https://i.redd.it/3krqd297yt801.jpg https://i.redd.it/6qjwnjgxb8901.jpg love it. Kind of diggin' the whole boot bands/cleaning rod retention deal lol. ETA- assuming they are boot bands. Front one looks like boot bands, rear one looks like.....algae ropes? |
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Colt all the shit!
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Originally Posted By JSchell1309:
Haven't seen these posted yet. Guy on Reddit posted his buddies deployed CQBR with a personal Vortex Razor AMG holographic sight on it. Thread 1 Thread 2 https://i.redd.it/3krqd297yt801.jpg https://i.redd.it/6qjwnjgxb8901.jpg View Quote |
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Originally Posted By blindrocket:
Which grip is that? Is it DD? The vertical foregrip sure looks like it's a DD. View Quote View All Quotes View All Quotes Originally Posted By blindrocket:
Originally Posted By JSchell1309:
Haven't seen these posted yet. Guy on Reddit posted his buddies deployed CQBR with a personal Vortex Razor AMG holographic sight on it. Thread 1 Thread 2 https://i.redd.it/3krqd297yt801.jpg https://i.redd.it/6qjwnjgxb8901.jpg |
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Colt all the shit!
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Originally Posted By Outrider:
Putting the "CQB" in CQBR. https://i.imgur.com/EDs0AXr.jpg https://i.imgur.com/ItFgUFb.jpg https://i.imgur.com/lBI503l.jpg View Quote |
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"My wife is in hell, where I sent her. She could make good biscuits, but her behavior was terrible." - Po Campo
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Originally Posted By MILSPEC556:
Shit, somebody better go tell that man his issued CQBR is clone incorrect! Kind of diggin' the whole boot bands/cleaning rod retention deal lol. ETA- assuming they are boot bands. Front one looks like boot bands, rear one looks like.....algae ropes? View Quote yeah i see boot bands LOL. |
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Originally Posted By JSchell1309:
Haven't seen these posted yet. Guy on Reddit posted his buddies deployed CQBR with a personal Vortex Razor AMG holographic sight on it. Thread 1 Thread 2 https://i.redd.it/3krqd297yt801.jpg https://i.redd.it/6qjwnjgxb8901.jpg View Quote |
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MK8 guys click here.
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Originally Posted By purevl2:
It's a pain in the ass to get SBRs in IL, so these complete Colt Lowers from Brownells will have to do. Optic for the Mod 0 is still up for debate. <a data-flickr-embed="true" href="https://www.flickr.com/gp/152204522@N02/0TkSk2" title="IMG_20180114_135707"><img src="https://farm5.staticflickr.com/4695/38794014875_e9c550a81f.jpg" width="500" height="371" alt="IMG_20180114_135707"></a><script async src="//embedr.flickr.com/assets/client-code.js" charset="utf-8"></script> View Quote |
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Squire
Without blood, it doesn't count! I survived ARFbortion2016 and all I got was this stupid sigline |
Originally Posted By prodigy808:
Mk18 mod 0 pistol https://s13.postimg.org/6kz8y1tvb/F99797_BE-87_C4-40_A2-863_D-138_BD366421_D.jpg View Quote |
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Squire
Without blood, it doesn't count! I survived ARFbortion2016 and all I got was this stupid sigline |
We're your friends. We're not like the others.
USA
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Too weird to live. Too rare to die.
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Originally Posted By MILSPEC556: Thankfully you're smarter than that Joe Teti clown from Dual Survival, (Got caught stealing a bunch of NVG equipment from his unit, then a med kit from a CH-47 crew, then later an MP5 from his contractor employer (I think triple canopy) Those are just the documented ones. View Quote |
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Originally Posted By HaveBlue83:
https://s9.postimg.org/6ckv7gy4f/IMG_20180114_153302_886.jpg more Gman spam. because its somehow allowed in here and "correct" winning. View Quote |
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Originally Posted By JSchell1309:
Haven't seen these posted yet. Guy on Reddit posted his buddies deployed CQBR with a personal Vortex Razor AMG holographic sight on it. Thread 1 Thread 2 https://i.redd.it/3krqd297yt801.jpg https://i.redd.it/6qjwnjgxb8901.jpg View Quote |
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Jesus came to comfort the afflicted and afflict the comfortable. - My Pastor
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