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3/2/2026 1:12:41 AM EDT
[#1]
@Combat_diver

For the M4A1 Block 1's, what was the "correct" BUIS?

Clone Rifles lists the Matech and KAC (assuming 200-600m) and there's debates all over that it was user preferred.
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3/2/2026 2:41:05 AM EDT
[Last Edit: Combat_Diver][Edited] [#2]
Quote History
Originally Posted By doolz:
@Combat_diver

For the M4A1 Block 1's, what was the "correct" BUIS?

Clone Rifles lists the Matech and KAC (assuming 200-600m) and there's debates all over that it was user preferred.
View Quote


@doolz

Block I was originally issued with the KAC 300m BUIS.  Others didn't come out till GWOT started.  All depends on where in the timeline you want.
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
3/2/2026 7:20:54 AM EDT
[#3]
Quote History
Originally Posted By Combat_Diver:


@doolz

Block I was originally issued with the KAC 300m BUIS.  Others didn't come out till GWOT started.  All depends on where in the timeline you want.
View Quote

How popular/liked were the Matechs? And was it a user preferred smorgasbord of those, KAC and LMT?
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3/2/2026 7:37:37 AM EDT
[#4]
Quote History
Originally Posted By doolz:

How popular/liked were the Matechs? And was it a user preferred smorgasbord of those, KAC and LMT?
View Quote

MaTechs are a big Army BUIS and most common.  The KACs 300 and 600 were always seem to be in short supply.  Most guys just zero once then leave on and never use them as they used the optics.  After all a BUIS.  Big Army refers the MaTechs as fidget spinners as troops constantly finger fuk them when bored and wonder why they are broken.  Its easier for me as an armorer to get MaTechs then KACs too.
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
3/2/2026 8:00:15 PM EDT
[#5]
Quote History
Originally Posted By Combat_Diver:

MaTechs are a big Army BUIS and most common.  The KACs 300 and 600 were always seem to be in short supply.  Most guys just zero once then leave on and never use them as they used the optics.  After all a BUIS.  Big Army refers the MaTechs as fidget spinners as troops constantly finger fuk them when bored and wonder why they are broken.  Its easier for me as an armorer to get MaTechs then KACs too.
View Quote View All Quotes
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Quote History
Originally Posted By Combat_Diver:
Originally Posted By doolz:

How popular/liked were the Matechs? And was it a user preferred smorgasbord of those, KAC and LMT?

MaTechs are a big Army BUIS and most common.  The KACs 300 and 600 were always seem to be in short supply.  Most guys just zero once then leave on and never use them as they used the optics.  After all a BUIS.  Big Army refers the MaTechs as fidget spinners as troops constantly finger fuk them when bored and wonder why they are broken.  Its easier for me as an armorer to get MaTechs then KACs too.

Guilty
God will not look you over for medals, diplomas, or degrees – but for scars
3/2/2026 11:17:01 PM EDT
[#6]
Quote History
Originally Posted By SecretSquirell:

Guilty
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Quote History
Originally Posted By SecretSquirell:
Originally Posted By Combat_Diver:
Originally Posted By doolz:

How popular/liked were the Matechs? And was it a user preferred smorgasbord of those, KAC and LMT?

MaTechs are a big Army BUIS and most common.  The KACs 300 and 600 were always seem to be in short supply.  Most guys just zero once then leave on and never use them as they used the optics.  After all a BUIS.  Big Army refers the MaTechs as fidget spinners as troops constantly finger fuk them when bored and wonder why they are broken.  Its easier for me as an armorer to get MaTechs then KACs too.

Guilty

I used to flick mine up and down constantly as a fidget.
Why is the sky blue?
What makes the green grass grow?
3/3/2026 3:45:51 AM EDT
[#7]
See what I mean!!
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
3/4/2026 12:19:08 AM EDT
[#8]
@Combat_Diver

CD, or anyone with the knowledge of wisdom…

What is the mount in these photos? I can’t find any research on it….

Attached File
Attached File
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3/4/2026 1:15:15 AM EDT
[Last Edit: 11boomboom][Edited] [#9]
Quote History
Originally Posted By doolz:
@Combat_Diver

CD, or anyone with the knowledge of wisdom…

What is the mount in these photos? I can’t find any research on it….

https://www.ar15.com/media/mediaFiles/557146/IMG_5755_webp-3723085.JPGhttps://www.ar15.com/media/mediaFiles/557146/IMG_5733_jpeg-3723086.JPG
View Quote

Which mount? Looks like a gen 1 M68 mount and a possible gen 2 mount in the second picture.

Are you talking about the PEQ or M68?
Why is the sky blue?
What makes the green grass grow?
3/4/2026 2:30:01 AM EDT
[#10]
Concur, Aimpoint QRP mount.  This was the mount issued with the M68 CCO

De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
3/4/2026 6:04:00 AM EDT
[Last Edit: TGWLDR][Edited] [#11]
Quote History
Originally Posted By 11boomboom:

Looks like a gen 1 M68 mount and a possible gen 2 mount in the second picture.

View Quote View All Quotes
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Quote History
Originally Posted By 11boomboom:
Originally Posted By doolz:
@Combat_Diver

CD, or anyone with the knowledge of wisdom…

What is the mount in these photos? I can’t find any research on it….

https://www.ar15.com/media/mediaFiles/557146/IMG_5755_webp-3723085.JPGhttps://www.ar15.com/media/mediaFiles/557146/IMG_5733_jpeg-3723086.JPG

Looks like a gen 1 M68 mount and a possible gen 2 mount in the second picture.


3/4/2026 8:12:50 AM EDT
[Last Edit: doolz][Edited] [#12]
@TGWLDR
@Combat_Diver

Thank you both.

I had ordered a Comp M2 from TAC but accidentally lost the mount that came with it moving to a new house.

It was either the Rev 1 or Rev 2. Trying to find a replacement now.

When were the Wilcox mounts put into use and which mounts was preferred?
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3/4/2026 8:59:06 AM EDT
[Last Edit: Combat_Diver][Edited] [#13]
Quote History
Originally Posted By doolz:
@TGWLDR
@Combat_Diver

Thank you both.

I had ordered a Comp M2 from TAC but accidentally lost the mount that came with it moving to a new house.

It was either the Rev 1 or Rev 2. Trying to find a replacement now.

When were the Wilcox mounts put into use and which mounts was preferred?
View Quote

As far as I know only the Navy on the Mk18 Mod 0 used the Wilcox mount.  All Army used the QRP in the M68 CCO kit as issued.  Block I is started in 1995, M68 adopted by big Army around 97' and Mk18 Mod 0/CQBR early 2000s.  Trivia: The Army adopted the Comp M in 1997, then Comp 2 in 2000, later the Comp4.  All called the M68 CCO.

My company A/1/5, used the Trijicon Reflex before we went to SFARTAETC (2 month CQB course), where we used the CompM during mid 97'
Attached File




CD
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
3/4/2026 10:37:15 AM EDT
[Last Edit: TGWLDR][Edited] [#14]
Quote History
Originally Posted By doolz:


When were the Wilcox mounts put into use and which mounts was preferred?
View Quote


Preference would lean towards what you intend to clone, (Army/ Navy).


The Wilcox were developed / issued late 1990s, specifically used with Aimpoint Comp M sights in the NSWC-Crane SOPMOD kit.

("ECOS-N" (Enhanced Combat Optical Sight - Navy)
3/4/2026 12:49:25 PM EDT
[#15]
I’m going with the M4A1 Block 1 based on Clone Rifles specs. Just tinkering with the optic setup and was never able to cement the answer until now.

So it looks like I’m on the hunt for an AimPoint mount and I’ll return the Wilcox mount I have on order.

Silly me purchased one of the Comp M2s from Thoroughbred and it came with the QRP Mount, scope cover and kill flash. And of course, silly me put the optic in a different box and it looks like I discarded the Mount while moving.
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3/4/2026 4:17:32 PM EDT
[#16]
@doolz
The Gen1 mount is flat at the base, and the later versions were angled. My understanding is that the Gen1 mount would crack at the base where the vertical met with the base, so the later version had more meat added at that point to prevent breaking.
¡Ahora sin chingas!
3/4/2026 4:37:48 PM EDT
[#17]
Quote History
Originally Posted By m24shooter:
@doolz
The Gen1 mount is flat at the base, and the later versions were angled. My understanding is that the Gen1 mount would crack at the base where the vertical met with the base, so the later version had more meat added at that point to prevent breaking.
View Quote

Just returned the Wilcox and ordered a QRP3 mount. Noticed the angle on it as well.

I’m not a clone master by any means but the visual will be there.

Thanks for the help!
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3/12/2026 9:05:07 PM EDT
[Last Edit: doolz][Edited] [#18]
Bad link.
RIP EE.
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3/13/2026 8:52:22 PM EDT
[#19]
It's crazy to see this topic I started so many years ago still going strong! I guess I need to throw up some more pictures soon
3/13/2026 10:36:29 PM EDT
[#20]
Quote History
Originally Posted By rbhoover:
It's crazy to see this topic I started so many years ago still going strong! I guess I need to throw up some more pictures soon
View Quote


@rbhoover

Probably a silly question and asked before but do you have any of the images from the first page? Is it possible to fix them?
No more metaphors.
3/15/2026 7:12:49 PM EDT
[#21]
Attached File


Can anyone ID this mount?
RIP EE.
Be courteous.
Return Feedback.
3/15/2026 7:40:13 PM EDT
[#22]
Quote History
Originally Posted By doolz:
https://www.ar15.com/media/mediaFiles/557146/IMG_5872_png-3730238.JPG

Can anyone ID this mount?
View Quote

Mount for what?
3/15/2026 8:08:44 PM EDT
[#23]
Quote History
Originally Posted By TGWLDR:

Mount for what?
View Quote View All Quotes
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Quote History
Originally Posted By TGWLDR:
Originally Posted By doolz:
https://www.ar15.com/media/mediaFiles/557146/IMG_5872_png-3730238.JPG

Can anyone ID this mount?

Mount for what?



I believe he's asking about the mount for the light on the bottom of the rifle.

I could be wrong of course.
3/15/2026 8:14:03 PM EDT
[#24]
Quote History
Originally Posted By Tamarit_167:



I believe he's asking about the mount for the light on the bottom of the rifle.

I could be wrong of course.
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Quote History
Originally Posted By Tamarit_167:
Originally Posted By TGWLDR:
Originally Posted By doolz:
https://www.ar15.com/media/mediaFiles/557146/IMG_5872_png-3730238.JPG

Can anyone ID this mount?

Mount for what?



I believe he's asking about the mount for the light on the bottom of the rifle.

I could be wrong of course.

If that's the case, it's the standard SF mount that comes with the light.
God will not look you over for medals, diplomas, or degrees – but for scars
3/15/2026 8:14:21 PM EDT
[#25]
Quote History
Originally Posted By Tamarit_167:



I believe he's asking about the mount for the light on the bottom of the rifle.

I could be wrong of course.
View Quote View All Quotes
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Quote History
Originally Posted By Tamarit_167:
Originally Posted By TGWLDR:
Originally Posted By doolz:
https://www.ar15.com/media/mediaFiles/557146/IMG_5872_png-3730238.JPG

Can anyone ID this mount?

Mount for what?



I believe he's asking about the mount for the light on the bottom of the rifle.

I could be wrong of course.

Possibly.  

If so, I'm fairly certain that its a SureFire M49 Thumbscrew Mount.
3/15/2026 8:47:27 PM EDT
[Last Edit: doolz][Edited] [#26]
Quote History
Originally Posted By TGWLDR:

Mount for what?
View Quote

Yeah brain fart.

Light mount.

And it looks like it’s the SureFire mount. Trying to do some research on it now.
RIP EE.
Be courteous.
Return Feedback.
3/15/2026 8:58:04 PM EDT
[#27]
Quote History
Originally Posted By doolz:

Yeah brain fart.

Light mount.

And it looks like it’s the SureFire mount. Trying to do some research on it now.
View Quote



@doolz

EBAY LINK

3/16/2026 9:07:37 AM EDT
[#28]
US Army M68 Close Combat Optic aka Aimpoint CompM Series
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
3/19/2026 11:16:44 AM EDT
[#29]

Where I’m at with mine.
3/20/2026 8:22:36 AM EDT
[#30]
Left Iraq earlier this week and making my way home.   Been on this job since 2014' down range and closing the book.  Need to spend time with the family and grandkids.


CD
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
3/20/2026 9:27:30 AM EDT
[#31]
Quote History
Originally Posted By Combat_Diver:
Left Iraq earlier this week and making my way home.   Been on this job since 2014' down range and closing the book.  Need to spend time with the family and grandkids.


CD
View Quote


Well deserved and enjoy!


I need to take a pic of my sopmod carbine shew.

Game on!
3/20/2026 9:42:37 AM EDT
[#32]
Quote History
Originally Posted By Combat_Diver:
Left Iraq earlier this week and making my way home.   Been on this job since 2014' down range and closing the book.  Need to spend time with the family and grandkids.


CD
View Quote

@Combat_Diver

CD,
You hanging up your hat? Done for good, or just a temporary hiatus?
3/20/2026 10:08:54 AM EDT
[#33]
Quote History
Originally Posted By TGWLDR:

@Combat_Diver

CD,
You hanging up your hat? Done for good, or just a temporary hiatus?
View Quote

Done from OCONUS work thats for sure.  Can't sit still you all know that.
De Oppresso Liber
Iraq: 91,03,04,05,06,08,09,15,16,22-26'
Afghanistan: 09,10,11,14,17,-21'
3/20/2026 10:40:52 AM EDT
[#34]
This is my Block Iish M4. 1997 dated barrel, mostly Colt parts for the base gun except a PSA M4A1 lower for now, KAC M4RAS, Car stock with zip-tied pad. I have a few M68 bases--I need to find a deal on an M2. Gemtech mount (I know) is pinned. I have a ton of rounds through this thing. Always goes bang and hits what I'm pointing at.

Attached File
“We've fallen a long way from John Adams representing British Soldiers.” - Aimless
3/20/2026 10:42:17 AM EDT
[#35]
Quote History
Originally Posted By Combat_Diver:

Done from OCONUS work thats for sure.  Can't sit still you all know that.
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Originally Posted By Combat_Diver:
Originally Posted By TGWLDR:

@Combat_Diver

CD,
You hanging up your hat? Done for good, or just a temporary hiatus?

Done from OCONUS work thats for sure.  Can't sit still you all know that.
Best of luck with everything! My brother in law joined another agency when he retired from the Army. He's not in his neighborhood right now.
“We've fallen a long way from John Adams representing British Soldiers.” - Aimless
3/20/2026 10:43:32 AM EDT
[#36]
Quote History
Originally Posted By Combat_Diver:

Done from OCONUS work thats for sure.  Can't sit still you all know that.
View Quote

Good for you sir. Best of luck, welcome home.
3/20/2026 11:58:41 AM EDT
[#37]
Quote History
Originally Posted By Combat_Diver:

Done from OCONUS work thats for sure.  Can't sit still you all know that.
View Quote


Grats on pulling chocks.  Try to enjoy some time off before you get too antsy and do shit again.  
3/21/2026 3:39:45 PM EDT
[#38]
Attached File
Game on!
3/27/2026 12:24:55 PM EDT
[#39]
Quote History
Originally Posted By Combat_Diver:
Left Iraq earlier this week and making my way home.   Been on this job since 2014' down range and closing the book.  Need to spend time with the family and grandkids.


CD
View Quote


Safe travels. Be well and take care of yourself.
Cowabunga it is...

“We’ve been looking for the enemy for some time now. We’ve finally found him. We’re surrounded. That simplifies the problem.” -Chesty Puller
4/3/2026 11:00:43 AM EDT
[#40]
Attached File
Attached File
Putting the good in Good Friday. It's a Block 1 party around here
4/3/2026 12:11:56 PM EDT
[#41]
Attached File
Day 1 mods
4/9/2026 1:35:52 PM EDT
[#42]
Behold the M4 as I saw it.

The M4 Rifle: Evolution of America’s Fighting Carbine (1995–Present).
5/6/2026 10:05:08 PM EDT
[Last Edit: Nostromo][Edited] [#43]
Thundercat bumpAttached File


Edit:
Everything except the stock and mag came from the EE including: Sabre Defence XR15-A3 with 14.5 p/w, TA31RCO, MaTech BUIS, KAC RAS, P&S grip
5/8/2026 6:51:42 PM EDT
[#44]
I finally got most everything for the clone of the last carbine I was ever issued in the Navy for my last deployment ever.

I think it fits in this SOPMOD category somewhere.

I wanted a regular length upper so I could put it on my SBR lower to travel across state lines without paperwork so I bought a SOCOM profile barrel and had ADCO pIN and weld the regular extended A2 flasher on it. The original had a KAC NT4.

KAC rail
KAC 300 meter BUIS
CQD End plate
TD vertical grip
Surefire scout
B5 SOPMOD government issue stock

I had to buy a sling as the one that came in the kit issued to me was a single point. Thankfully LBT still had a storefront at that time in VB.

It’s an LBT Quick adjust with some shop mods. Attached to the side sling swivel up front and the CQD plate via Hk hook on the back.

I have the Wilcox m68 mount just need to find an Aimpoint M2.

Also need to find one of the early SOFTT and some rigger bands to attach it to the stock.

The lower and obviously the guts are not the same as a real M4 but it’s about as close as I can get with the overall set up layout components.

Below is as close as I can replicate to a NSW support guys (or gals) M4.

Attached File


Attached File


Need a Mk25 to go with it.
5/26/2026 10:12:05 PM EDT
[#45]
Attached File
5/26/2026 11:24:36 PM EDT
[#46]
Quote History

Clean, efficient.
5/27/2026 8:19:28 AM EDT
[#47]
Attached File


Needs a RAS.
5/27/2026 1:34:19 PM EDT
[#48]
Quote History
View Quote

Awesome start! The RAS is the GOAT of all quadrails!
5/27/2026 1:39:39 PM EDT
[#49]
Quote History
Originally Posted By TNTundra16:

Awesome start! The RAS is the GOAT of all quadrails!
View Quote

Unfortunately it’s priced that way!
5/27/2026 2:24:24 PM EDT
[Last Edit: Vague][Edited] [#50]
Quote History
View Quote

Shameless plug...

There's one on the EE. Feel free to make an offer. I'm looking for a RIS II FSB for a block II.

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