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Mk 18 / CQBR (Page 1607 of 1609)

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8/4/2026 4:13:54 PM EDT
[#1]
Quote History
Originally Posted By ChemTrailZ:


If running suppressed I feel like the weight of the b5/lmt balances better
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Quote History
Originally Posted By ChemTrailZ:
Originally Posted By Combat_Diver:
Stock options either LMT SOPMOD or Colt N1?

https://www.ar15.com/media/mediaFiles/32677/IMG_5153_jpeg-3806098.JPG


If running suppressed I feel like the weight of the b5/lmt balances better

This, for suppressed, the SOCOM will be better balanced.
Why is the sky blue?
What makes the green grass grow?
8/4/2026 4:24:00 PM EDT
[#2]
Quote History
Originally Posted By ChemTrailZ:


If running suppressed I feel like the weight of the b5/lmt balances better
View Quote

Not yet on RC
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
8/4/2026 8:43:22 PM EDT
[#3]
Quote History
Originally Posted By Combat_Diver:
Stock options either LMT SOPMOD or Colt N1?

https://www.ar15.com/media/mediaFiles/32677/IMG_5153_jpeg-3806098.JPG
View Quote


LMT. Better balance, plus storage.
“Envy was once considered to be one of the seven deadly sins before it became one of the most admired virtues under its new name, social justice.” Thomas Sowell
8/4/2026 11:25:38 PM EDT
[#4]
Quote History
Originally Posted By Combat_Diver:
Stock options either LMT SOPMOD or Colt N1?

https://www.ar15.com/media/mediaFiles/32677/IMG_5153_jpeg-3806098.JPG
View Quote


I kinda swap back and forth. I've shot the most with the N1 by far, but lately I've been running SOPMODs. Both my Block IIs are currently running SOPMODs.

But, when it comes to lighter weight and compact size, you can't beat the N1. It fits so nicely between my driver's seat and the console. I've got the N1 on my Block I, and in time, I'm sure I'll eventually put them back on the Block IIs.

Plus,  I've still got my original N1 that came off a Colt A2 Government Carbine I got in 1995, which was my 2nd AR (and a Pre-Ban, oh my). That started my affinity for the N1. I usually run it on my main Block II, and I must say, I am quite partial to it, lol.

If I had to pick one and only one, I'd go N1.
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
8/5/2026 8:01:39 AM EDT
[#5]
Are the M4A1 take down pins just the Schmidt ones?
8/5/2026 8:26:26 AM EDT
[#6]
Quote History
Originally Posted By neight:
Are the M4A1 take down pins just the Schmidt ones?
View Quote

Standard USGI
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
8/5/2026 9:11:05 AM EDT
[#7]
Thanks.

I will put a search in for that and see what I come up with.
Unless anybody here can point me in the direction. I’m getting a couple sets.
8/5/2026 2:43:21 PM EDT
[#8]
Quote History
Originally Posted By neight:
Thanks.

I will put a search in for that and see what I come up with.
Unless anybody here can point me in the direction. I’m getting a couple sets.
View Quote


Coltparts wrbsite has most individual small parts, and they are guaranteed to meet usgi spec

Schmidt is close but there are small differences I’ve noticed (thinner trigger guards with smaller detent springs, and different spec on roll pins, etc)

I stick with Colt when I can, complete LPKs as well as LPKS without groups and FCGs are available, but if you need individual parts I like coltparts as well as the website that should not be named
8/5/2026 2:46:13 PM EDT
[#9]
Quote History
Originally Posted By Combat_Diver:

All prior to 2014 when I started working for SOCCOM/Crane
View Quote


@Combat_Diver ok so I figure as time goes on the 10/14 is clearly the most common, but prior to its widespread adoption would any of the others have been more common?  I feel the U and CQBR were the least common from what I’ve seen so most common would been X prefix followed by the 10/14 series?
8/5/2026 4:24:07 PM EDT
[#10]
Quote History
Originally Posted By ChemTrailZ:


@Combat_Diver ok so I figure as time goes on the 10/14 is clearly the most common, but prior to its widespread adoption would any of the others have been more common?  I feel the U and CQBR were the least common from what I’ve seen so most common would been X prefix followed by the 10/14 series?
View Quote

Correct. Only seen 1-2 CQBR, maybe 3-4 X series and 100-150 10/14 series. These were all an attempt to track the uppers and was dropped as impractical to keep track of for maintenance and uppers being swapped around
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
8/5/2026 6:25:37 PM EDT
[#11]
Quote History
Originally Posted By Combat_Diver:

Correct. Only seen 1-2 CQBR, maybe 3-4 X series and 100-150 10/14 series. These were all an attempt to track the uppers and was dropped as impractical to keep track of for maintenance and uppers being swapped around
View Quote

So what I hear you saying is that those were short-lived and impractical. This is a requirement for cloning.
8/6/2026 12:33:58 PM EDT
[Last Edit: AZ_SBR][Edited] [#12]
Which weapon light would complement this build the best?

Options based on what I want to spend are:
A) Somogear WMX200 clone, bronze
B) SureFire Scout M600C, black
C) SureFire Scout M300 or M600 more recent version but still with thumscrew mount
D) Something else

8/6/2026 1:56:15 PM EDT
[Last Edit: Combat_Diver][Edited] [#13]
Quote History
Originally Posted By AZ_SBR:
Which weapon light would complement this build the best?

Options based on what I want to spend are:
A) Somogear WMX200 clone, bronze
B) SureFire Scout M600C, black
C) SureFire Scout M300 or M600 more recent version but still with thumscrew mount
D) Something else

https://live.staticflickr.com/65535/55446644941_0cf5597761_b.jpg
View Quote

GOWT Surefire M951 series
Block I 95-01’ Surefire 6P in a Weaver 1” ring (change BUIS to KAC 300m)
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
8/6/2026 1:58:20 PM EDT
[#14]
Quote History
Originally Posted By Combat_Diver:
Stock options either LMT SOPMOD or Colt N1?

https://www.ar15.com/media/mediaFiles/32677/IMG_5153_jpeg-3806098.JPG
View Quote

Eform 1 SBR submitted Monday 0900, approved today Thursday 1236.
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
8/6/2026 3:51:13 PM EDT
[#15]
Quote History
Originally Posted By AZ_SBR:
Which weapon light would complement this build the best?

Options based on what I want to spend are:
A) Somogear WMX200 clone, bronze
B) SureFire Scout M600C, black
C) SureFire Scout M300 or M600 more recent version but still with thumscrew mount
D) Something else

https://live.staticflickr.com/65535/55446644941_0cf5597761_b.jpg
View Quote


M900
8/6/2026 5:34:31 PM EDT
[#16]
Thanks for the suggestions. Asking because I’m selling this MK18 /early CQBR Block 1 light.

Surefire M962 Tac Light
8/6/2026 10:30:18 PM EDT
[#17]
Quote History
Originally Posted By TNTundra16:

That looks a little larger than mine. Mine is 45mm or a tad over 1-3/4" wide. How wide is yours?
View Quote


47mmx26mm roughly.
8/9/2026 12:03:50 PM EDT
[#18]
Attached File
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
8/9/2026 4:06:08 PM EDT
[#19]
I want a combat diver built mk18 upper!
8/9/2026 11:04:00 PM EDT
[Last Edit: krdt][Edited] [#20]
Quote History
Originally Posted By AZ_SBR:
Which weapon light would complement this build the best?

Options based on what I want to spend are:
A) Somogear WMX200 clone, bronze
B) SureFire Scout M600C, black
C) SureFire Scout M300 or M600 more recent version but still with thumscrew mount
D) Something else

https://live.staticflickr.com/65535/55446644941_0cf5597761_b.jpg
View Quote


I went with the M600DF on mine for now. I'd say that, or since you have the tan PEQ15, it'd match up with the WMX200 nicely.

The refinished NT4 and lower look good!
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
8/10/2026 5:45:59 PM EDT
[#21]
Anyone have a FDE surefire scout thumbscrew mount, I need one to put my scout on my mk18 and I lost it for a mlok mount years ago.
8/10/2026 10:10:33 PM EDT
[Last Edit: AZ_SBR][Edited] [#22]
Quote History
Originally Posted By krdt:


I went with the M600DF on mine for now. I'd say that, or since you have the tan PEQ15, it'd match up with the WMX200 nicely.

The refinished NT4 and lower look good!
View Quote

Thanks man!

I ended up getting a nearly MINT SU-233 kit from another member here.  Light output is dismal, but it completes the look and allows me to run my L3 Insight dual-button remote which I've saved over the years.



Clone family pic.
Mk12 Mod 1
CQBR Block 1 with Block 2 kit
Mk27 Mod 0

8/10/2026 10:34:32 PM EDT
[#23]
Quote History
Originally Posted By AZ_SBR:

Thanks man!

I ended up getting a nearly MINT SU-233 kit from another member here.  Light output is dismal, but it completes the look and allows me to run my L3 Insight dual-button remote which I've saved over the years.

https://live.staticflickr.com/65535/55455183572_4d5135105f_b.jpg

Clone family pic.
Mk12 Mod 1
CQBR Block 1 with Block 2 kit
Mk27 Mod 0

https://live.staticflickr.com/65535/55456282823_1edcbb3a25_b.jpg
View Quote View All Quotes
View All Quotes
Quote History
Originally Posted By AZ_SBR:
Originally Posted By krdt:


I went with the M600DF on mine for now. I'd say that, or since you have the tan PEQ15, it'd match up with the WMX200 nicely.

The refinished NT4 and lower look good!

Thanks man!

I ended up getting a nearly MINT SU-233 kit from another member here.  Light output is dismal, but it completes the look and allows me to run my L3 Insight dual-button remote which I've saved over the years.

https://live.staticflickr.com/65535/55455183572_4d5135105f_b.jpg

Clone family pic.
Mk12 Mod 1
CQBR Block 1 with Block 2 kit
Mk27 Mod 0

https://live.staticflickr.com/65535/55456282823_1edcbb3a25_b.jpg


Nice!
8/10/2026 10:48:05 PM EDT
[Last Edit: bbridson][Edited] [#24]
Quote History
Originally Posted By AZ_SBR:

Thanks man!

I ended up getting a nearly MINT SU-233 kit from another member here.  Light output is dismal, but it completes the look and allows me to run my L3 Insight dual-button remote which I've saved over the years.

https://live.staticflickr.com/65535/55455183572_4d5135105f_b.jpg

Clone family pic.
Mk12 Mod 1
CQBR Block 1 with Block 2 kit
Mk27 Mod 0

https://live.staticflickr.com/65535/55456282823_1edcbb3a25_b.jpg
View Quote


That's a nice looking light right there. I'm amazed that the elastic bit on the filter is still intact.

Speaking of dismal light output, have you seen what it looks like with the filter on? I thought that I might be able to set up the peq-15 illuminator to be narrow and the m3x to be wide, but the m3x is so bad that it doesn't even light up my room.

I don't see myself using it with the filter ever again, so I'll probably throw a lumens factory led kit in it soon.
8/10/2026 10:54:53 PM EDT
[Last Edit: krdt][Edited] [#25]
With all the current fixin's. Still haven't gotten the time or worked up the motivation to strip n' paint.



Did someone say Mk27? :D



My version of a Mk27 Mod 2. I took a few liberties, namely going with a G5 over G4 -- for cost/convenience and because I dislike finger grooves. Also, I have to have my custom light triggers, lol.

All the same, I'm happy with it.
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
8/10/2026 10:58:51 PM EDT
[#26]
Quote History
Originally Posted By AZ_SBR:

Thanks man!

I ended up getting a nearly MINT SU-233 kit from another member here.  Light output is dismal, but it completes the look and allows me to run my L3 Insight dual-button remote which I've saved over the years.

https://live.staticflickr.com/65535/55455183572_4d5135105f_b.jpg

Clone family pic.
Mk12 Mod 1
CQBR Block 1 with Block 2 kit
Mk27 Mod 0

https://live.staticflickr.com/65535/55456282823_1edcbb3a25_b.jpg
View Quote


Looks great. Sucks about the low output, but still plenty usable for something like HD if needed.
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
8/10/2026 11:28:40 PM EDT
[#27]
Quote History
Originally Posted By bbridson:


That's a nice looking light right there. I'm amazed that the elastic bit on the filter is still intact.

Speaking of dismal light output, have you seen what it looks like with the filter on? I thought that I might be able to set up the peq-15 illuminator to be narrow and the m3x to be wide, but the m3x is so bad that it doesn't even light up my room.

I don't see myself using it with the filter ever again, so I'll probably throw a lumens factory led kit in it soon.
View Quote

Just tried it inside my house. You're totally right. The light spills weird and it's pretty pathetic. The IR light on my LLI MH1s provided more illumination in comparison

8/10/2026 11:31:30 PM EDT
[#28]
Quote History
Originally Posted By krdt:
With all the current fixin's. Still haven't gotten the time or worked up the motivation to strip n' paint.

https://i.imgur.com/BjVEi0Y.jpeg

Did someone say Mk27? :D

https://i.imgur.com/msW2IRy.jpeg

My version of a Mk27 Mod 2. I took a few liberties, namely going with a G5 over G4 -- for cost/convenience and because I dislike finger grooves. Also, I have to have my custom light triggers, lol.

All the same, I'm happy with it.
View Quote

I, too, had a Gen 5 "Mock 27 Mod 2", then I sold it and got a 19 Gen 6, hated it, and sold that and got the new, unfired 19 Gen 3 I posted above. Threw on the Glock factory night sights, extended slide release, and maritime spring cups and achieved CLONE status.
8/11/2026 6:52:27 PM EDT
[#29]
Quote History
Originally Posted By krdt:
With all the current fixin's. Still haven't gotten the time or worked up the motivation to strip n' paint.

https://i.imgur.com/BjVEi0Y.jpeg

Did someone say Mk27? :D

https://i.imgur.com/msW2IRy.jpeg

My version of a Mk27 Mod 2. I took a few liberties, namely going with a G5 over G4 -- for cost/convenience and because I dislike finger grooves. Also, I have to have my custom light triggers, lol.

All the same, I'm happy with it.
View Quote


You rang?


Attached File

8/11/2026 7:29:10 PM EDT
[#30]
Received my new Colt ambi safety from Arms Unlimited today and was disappointed to see that the main lever is the undesirable hot dog. Marked S for Shmidt.

Anyone have a lead on a new, correct-looking Colt ambi safety?



Big ghey...

8/11/2026 7:35:20 PM EDT
[#31]
Quote History
Originally Posted By AZ_SBR:
Received my new Colt ambi safety from Arms Unlimited today and was disappointed to see that the main lever is the undesirable hot dog. Marked S for Shmidt.

Anyone have a lead on a new, correct-looking Colt ambi safety?

https://live.staticflickr.com/65535/55458185078_cb72757ec5_b.jpg

Big ghey...

https://live.staticflickr.com/65535/55458078861_a8995aa5a0_b.jpg
View Quote


AU carries both, contact them. Charlie’s carries both but is $$$ that other dude has them as well
8/11/2026 7:58:52 PM EDT
[#32]
Quote History
Originally Posted By ChemTrailZ:


AU carries both, contact them. Charlie’s carries both but is $$$ that other dude has them as well
View Quote

Sorry if I wasn't clear. I bought this from Arms Unlimited (AU). It was specifically the Colt ambi, semi-auto safety kit for $60.99.
8/11/2026 8:13:40 PM EDT
[#33]
Quote History
Originally Posted By AZ_SBR:

Sorry if I wasn't clear. I bought this from Arms Unlimited (AU). It was specifically the Colt ambi, semi-auto safety kit for $60.99.
View Quote


You were clear, what I’m saying is they carry both styles, sometimes they only have one or the other on hand, and sometimes they have both. You’ll need to contact them to verify what they have on hand and specify what you want, but sometimes you’ll still get the wrong one, though they’ve generally made it right for me.  For more $$ Charlie’s with guarantee you get the one you want, provided it’s in stock on their website.
8/11/2026 8:40:55 PM EDT
[#34]
Quote History
Originally Posted By ChemTrailZ:


You were clear, what I’m saying is they carry both styles, sometimes they only have one or the other on hand, and sometimes they have both. You’ll need to contact them to verify what they have on hand and specify what you want, but sometimes you’ll still get the wrong one, though they’ve generally made it right for me.  For more $$ Charlie’s with guarantee you get the one you want, provided it’s in stock on their website.
View Quote

Roger that. Thanks.
8/11/2026 9:54:14 PM EDT
[Last Edit: Solo_][Edited] [#35]
Still love the Mk18 the best



Colt Mark 18 Mod 0 by Solo__, on Flickr

8/11/2026 10:00:53 PM EDT
[Last Edit: neight][Edited] [#36]
Got my approval finally
Still working on parts but need to pay my pic thread taxAttached File


Edit
I just checked my email and got two more approvals. One for a INTLMILCO receiver that will wear this upper. I can’t paint this Cult M4LE double bullet but ordering rapco today to vandalize the new full set up.
By the way that’s three form 1’s in under a week. Maybe I should get a lotto ticket today too.
8/12/2026 11:15:03 AM EDT
[Last Edit: neight][Edited] [#37]
Quote History
Originally Posted By AZ_SBR:
Received my new Colt ambi safety from Arms Unlimited today and was disappointed to see that the main lever is the undesirable hot dog. Marked S for Shmidt.

Anyone have a lead on a new, correct-looking Colt ambi safety?

https://live.staticflickr.com/65535/55458185078_cb72757ec5_b.jpg

Big ghey...

https://live.staticflickr.com/65535/55458078861_a8995aa5a0_b.jpg
View Quote

I got several lmt ambi selectors. Mine are marked lmt but the new ones aren’t. Primary Arms has them and Roof Top
The ones at Roof Top are full auto though.
But reguardless they’re everywhere.
8/12/2026 1:18:20 PM EDT
[#38]
Quote History
Originally Posted By AZ_SBR:
Received my new Colt ambi safety from Arms Unlimited today and was disappointed to see that the main lever is the undesirable hot dog. Marked S for Shmidt.

Anyone have a lead on a new, correct-looking Colt ambi safety?

https://live.staticflickr.com/65535/55458185078_cb72757ec5_b.jpg

Big ghey...

https://live.staticflickr.com/65535/55458078861_a8995aa5a0_b.jpg
View Quote


If all else fails, get the FA. As far as I know, there's only one non-hotdog version.

https://armsunlimited.com/colt-m16-m4-ambidextrous-full-auto-safety-selector/?srsltid=AfmBOoqTdhkki58_J4zXYmoLAo6eE4zgMNChWfFmftAxQelKsKtN05Js

It's super easy to trim the nib off with a cut-off wheel to convert it to a semi-only (if running a FA part makes you nervous), but it'll work unmodified with a G trigger as well.
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
8/12/2026 1:42:52 PM EDT
[#39]
Quote History
Originally Posted By krdt:


If all else fails, get the FA. As far as I know, there's only one non-hotdog version.

https://armsunlimited.com/colt-m16-m4-ambidextrous-full-auto-safety-selector/?srsltid=AfmBOoqTdhkki58_J4zXYmoLAo6eE4zgMNChWfFmftAxQelKsKtN05Js

It's super easy to trim the nib off with a cut-off wheel to convert it to a semi-only (if running a FA part makes you nervous), but it'll work unmodified with a G trigger as well.
View Quote View All Quotes
View All Quotes
Quote History
Originally Posted By krdt:
Originally Posted By AZ_SBR:
Received my new Colt ambi safety from Arms Unlimited today and was disappointed to see that the main lever is the undesirable hot dog. Marked S for Shmidt.

Anyone have a lead on a new, correct-looking Colt ambi safety?

https://live.staticflickr.com/65535/55458185078_cb72757ec5_b.jpg

Big ghey...

https://live.staticflickr.com/65535/55458078861_a8995aa5a0_b.jpg


If all else fails, get the FA. As far as I know, there's only one non-hotdog version.

https://armsunlimited.com/colt-m16-m4-ambidextrous-full-auto-safety-selector/?srsltid=AfmBOoqTdhkki58_J4zXYmoLAo6eE4zgMNChWfFmftAxQelKsKtN05Js

It's super easy to trim the nib off with a cut-off wheel to convert it to a semi-only (if running a FA part makes you nervous), but it'll work unmodified with a G trigger as well.

AU gonna AU unfortunately.  I've had the same experience multiple times with not receiving what the photo shows.

The problem with running the FA in a Colt lower isn't so much the nib as it is the fact that there are multiple detents.  I have found it easy to overrotate the safety being most Colt lowers do not have lever stops.
8/12/2026 2:42:19 PM EDT
[#40]
Quote History
Originally Posted By THEdtw:

AU gonna AU unfortunately.  I've had the same experience multiple times with not receiving what the photo shows.

The problem with running the FA in a Colt lower isn't so much the nib as it is the fact that there are multiple detents.  I have found it easy to overrotate the safety being most Colt lowers do not have lever stops.
View Quote


Eh, I used FA safeties exclusively in my two Block IIs and Block I; I never had an issue. Overrotate in what way? Into safe and above it?

The Safe/Semi/Auto positions work just as a normal M4/M4A1 lower would with selector stops; the only difference is that it's technically capable of rotating past auto or past safe. Auto shouldn't be an issue because you have no reason to rotate that far, and I can't say I ever snapped into safe and then beyond it.

Not saying it isn't possible to do, but in something like 30k rounds using them, I never had a single problem.
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
8/12/2026 6:08:19 PM EDT
[#41]
Quote History
Originally Posted By krdt:


Eh, I used FA safeties exclusively in my two Block IIs and Block I; I never had an issue. Overrotate in what way? Into safe and above it?

The Safe/Semi/Auto positions work just as a normal M4/M4A1 lower would with selector stops; the only difference is that it's technically capable of rotating past auto or past safe. Auto shouldn't be an issue because you have no reason to rotate that far, and I can't say I ever snapped into safe and then beyond it.

Not saying it isn't possible to do, but in something like 30k rounds using them, I never had a single problem.
View Quote View All Quotes
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Quote History
Originally Posted By krdt:
Originally Posted By THEdtw:

AU gonna AU unfortunately.  I've had the same experience multiple times with not receiving what the photo shows.

The problem with running the FA in a Colt lower isn't so much the nib as it is the fact that there are multiple detents.  I have found it easy to overrotate the safety being most Colt lowers do not have lever stops.


Eh, I used FA safeties exclusively in my two Block IIs and Block I; I never had an issue. Overrotate in what way? Into safe and above it?

The Safe/Semi/Auto positions work just as a normal M4/M4A1 lower would with selector stops; the only difference is that it's technically capable of rotating past auto or past safe. Auto shouldn't be an issue because you have no reason to rotate that far, and I can't say I ever snapped into safe and then beyond it.

Not saying it isn't possible to do, but in something like 30k rounds using them, I never had a single problem.

Mine would go beyond into a weird dead spot when transitioning from semi to safe.  They would also go beyond auto if I pushed it that far.   Obviously no reason to go beyond semi anyways, but I did check it when I first installed the 2 I ordered.  It was enough to annoy me after a few range trips.  Put them in other lowers and sourced the semi ones.
8/12/2026 8:23:52 PM EDT
[#42]
Quote History
Originally Posted By THEdtw:

Mine would go beyond into a weird dead spot when transitioning from semi to safe.  They would also go beyond auto if I pushed it that far.   Obviously no reason to go beyond semi anyways, but I did check it when I first installed the 2 I ordered.  It was enough to annoy me after a few range trips.  Put them in other lowers and sourced the semi ones.
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Hmm, odd. Never experienced the halfway going from semi to safe. A time or two I've half-flicked from safe to semi when really pushing, trying to beat a time on a shot timer.

But I can't really blame the safety; I could've done the same with a semi-only safety. Now I've got a 45/90 Arcfire V2 in my main CQBR, so I can half-flick all day, lol.
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
8/12/2026 10:02:39 PM EDT
[#43]
You guys need to put an FRT in your MK18s so you can use the 3rd position.
Originally Posted By bradpierson26:
So I know you're a SF whore . . . . .
8/12/2026 10:13:33 PM EDT
[#44]
Quote History
Originally Posted By TheTacticalCoyote:
You guys need to put an FRT in your MK18s so you can use the 3rd position.
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Yeahup.
8/12/2026 10:14:20 PM EDT
[#45]
Quote History
Originally Posted By TheTacticalCoyote:
You guys need to put an FRT in your MK18s so you can use the 3rd position.
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I don't see no Americans. I see trespassers.
8/12/2026 11:07:45 PM EDT
[#46]
CQBR Dog knows about the power of the FRT.

Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
8/13/2026 7:31:40 PM EDT
[Last Edit: krdt][Edited] [#47]
Well, I just got notice that my RC is finally shipping back from Surefire. The email says it was 'repaired' but there was no charge, so I'm not sure what the fuck that means. I'm going to be seriously pissed if they kept my can from April 22nd until August 13th and didn't do shit to it.

I was expecting a charge, so either I got very lucky and they re-cored it for free for some reason, or they didn't do shit to it. I guess we'll find out next week when it gets here.

ETA: Looking around a bit, I guess it's not unheard of for Surefire to do a re-core for free, especially when it involves baffle strikes or not fitting properly to the muzzle device. Mine had both minor baffle strikes, as well as a fairly significant leak between the bearing surfaces and muzzle device. So, I guess it's not impossible that they did the re-core for free. If so, that's fantastic.

Nonetheless, I'd feel a lot better if the invoice or email actually detailed what the fuck they did.
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
8/14/2026 11:11:27 AM EDT
[#48]
Quote History
Originally Posted By krdt:
Well, I just got notice that my RC is finally shipping back from Surefire. The email says it was 'repaired' but there was no charge, so I'm not sure what the fuck that means. I'm going to be seriously pissed if they kept my can from April 22nd until August 13th and didn't do shit to it.

I was expecting a charge, so either I got very lucky and they re-cored it for free for some reason, or they didn't do shit to it. I guess we'll find out next week when it gets here.

ETA: Looking around a bit, I guess it's not unheard of for Surefire to do a re-core for free, especially when it involves baffle strikes or not fitting properly to the muzzle device. Mine had both minor baffle strikes, as well as a fairly significant leak between the bearing surfaces and muzzle device. So, I guess it's not impossible that they did the re-core for free. If so, that's fantastic.

Nonetheless, I'd feel a lot better if the invoice or email actually detailed what the fuck they did.
View Quote


Let us know how it goes, I have an open RMA but haven’t shipped it yet.
8/14/2026 8:30:44 PM EDT
[#49]
Assuming I don't miss it because I'm taking someone to the airport, I should have it tomorrow. Fingers crossed they re-cored it.
Practice, the master of all things. - Augustus
IG: @cqbr.kurdt
Looking for: Savannah Mk18 RIS II in light blonde/bronze - LMT SOPMOD Gen 1 Tan - Aimpoint Comp M3 w/ Lens Covers
8/15/2026 12:21:31 PM EDT
[#50]

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