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DocBach
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Posted: 7/7/2011 12:07:43 PM
[Last Edit: 2/24/2014 4:55:04 PM by DocBach]
So just an introduction to this thread - its purpose is to show off your Block II clone builds; here is a list of some of the common characteristics and equipment that the Block II M4A1s have:


THE Block II Chart (courtesy of Patriot_Man)

Barrel:
14.5" M4 or SOCOM contour barrel

Flash Hider:
KAC NT4
Surefire 4P

Rail System:
Early Block II M4A1s still used the KAC M4 RIS/RAS
DD RIS II in dark earth

Vertical grips
Tango down battle grip in tan
KAC
Grip-Pod

Rail panels:
Tango Down
KAC

Front sight:
KAC flip up in tan
standard front sight base (if early Block II with M4 RIS/RAS)

Optics:
Elcan Specter DR SU-230
EOTech SU-231-PEQ (EOTech 553)
EOTech SU-231A-PEQ (EOTech EXPS03)
ACOG SU-237 (TA01-ECOS)
EOTech/Aimpoint 3x magnifiers

IR Lasers:
Insight AN/PEQ-15/LA-5

Flashlight:
Insight M3 (SU-233/PVS)
Insight WMX200

Rear sight:
KAC 300m
KAC 600m
MaTech

Buttstock:
standard M4 (both older CAR style and newer "LE" style)
LMT SOPMOD



some reference pics


















early block II

more early Block IIs





Just to reiterate, you don't have to have an EXACT copy of a Block II M4A1 to post your rifle up here, but the purpose is to post pictures of our rifles that we've made specifically to emulate the issue Block II weapon system - if you've got a midlength carbine with an UBR stock that just happens to have a RIS II on it it is likely you did not intend the rifle be a "clone" of the newest generation M4A1, and probably doesn't belong in this picture thread.

Rifles that have no Block II components ie standard M4geries with Block I Optics do not embody the purpose of this thread and though they are nice weapons in their own right, shouldn't be posted in this thread to avoid unnecessary clutter.



Originally Posted By Augee:


The easiest visual discriminator of whether you're looking at a SOPMOD equipped M4A1 or an MWS M4 is usually the identity of who is holding it. If it's a SOF troop, it's probably a SOPMOD M4[A1]. If it's a conventional troop, it's probably an M4 MWS.

SOPMOD = SOF
MWS = Conventional

The SOPMOD program was initially fielded in 1996, and the two have not significantly converged or crossed over at all since then, and there is almost no commonality between systems used in the two. They are separate lines of development and evolution managed by two totally different components (Army and Navy).

SOPMOD is run by NSWC-Crane to equip SOF M4A1 Carbines with accessories. There are two distinct "blocks" as identified by NSWC-Crane PowerPoints as the primary source of information, however, there was a "transitional period" of several years in which carbines with items from both blocks were used. Because of a PowerPoint slide that was published (IIRC?) 2006 showing a block labeled "phased replacement," it has become the colloquial term for "transitional" configurations.

"Block x" does NOT refer, in an "official" sense to a specific configuration of rifle. It refers to specific modifications (read accessories) to the SOF M4A1 weapon system that are managed by Crane.

Colloquially we refer to M4A1s with accessories from the first block of the SOPMOD program as "Block 1," while using "Block 2" to describe carbines with the RIS II, one of the last components of the second block of the SOPMOD program to be fielded. Carbines with the accessories/features of both blocks of the SOPMOD program, but without the RIS II, we refer to as "Phased Replacement." It is important to note, however, that this colloquial classification is generally limited to this thread, and others both here and on other sites that feed off of it.

The important thing to understand is that the SOPMOD program is almost always limited to SOF only, and 99% of the time, the "actual" weapon in question will be an M4A1, not an M4.

The M4 is a conventional forces weapon system, and is totally separate from the SOPMOD program and SOF modifications, though they were "inspired" by the SOPMOD program, almost every single actual item is different.

The M4 is managed by the Army overall through TACOM, though the Marine Corps also manages their own programs through their own directorates for their specific incarnation of the M4.

The M4 is a conventional forces platform, and is upgraded through modular weapon system (MWS) upgrades. There are no specific blocks, increments, or generations, and their specifics vary by time period, unit, and MTOE.

~Augee

"Soldier, you need to turn your ACOG off before the batteries die." - PMI Instructor, subject matter expert
cowboy7242001
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Posted: 7/7/2011 12:16:39 PM
Good thread
The legend.

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Lumpy196
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Posted: 7/7/2011 12:38:56 PM
Your kid wrote on your wall with a crayon.
Originally Posted By krpind:
Whatever happened to eating his ass out in the Principal's office and then laughing your ass off as soon as he was gone and admitting that he got us good.
DocBach
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Posted: 7/7/2011 12:52:01 PM
Yeah, and on my end table, too.
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Mattyvac
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Posted: 7/7/2011 1:00:46 PM
We gonna be sticklers in here? I have an unfinished clone that has some "meantime" parts on it. Will post tonight.
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Posted: 7/7/2011 1:02:43 PM
new-arguy
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Posted: 7/7/2011 1:27:15 PM



Thanks for the new thread doc. I enjoy building clone guns and saw the MARSOC M4 in the MK18 thread a while back. I like it right away and went about building one. Mine is a real franken gun:
BCM lower that was IonBonded in brown
DD 14.5" mid length Govt profile barrel
DD RIS II M4A1 rail
BCM BCG
GunFighter Mod 4
Spikes stripped upper
PRI rear sight in brown
KAC front sight in brown
SF Flash hider
Magpul CTR
Magpul RSA
Magpul ASAP
Magpul MIAD
Aimpoint M4s w/ Aimpoint cantilever throwlever mount

I know the ACOG is the appropriate optic, but I shoot my guns with Aimpoints much more often and I had an extra M4s on a gun thats just been sitting in the safe. It was a real pain to find an upper in roughly the same color as the lower and rail. Lower and rail match pretty well, the upper has more of a green hue. Just as I was about to get a black upper to finish the gun, I came accross a guy who had a full Spikes gun in this color, but was selling the upper seperate. I asked if he minded if I bought the upper alone and replaced his with a black one. He didn't and that's how I wond up with this.

I've been shooting this gun a lot since I've built it, usually with the Surefire can. Shot it several times at our Friday night range outings, and at a few CFDCC matches. It's been great, and I expect to be shooting it a lot more!
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DocBach
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Posted: 7/7/2011 1:31:39 PM
Originally Posted By new-arguy:


I know the ACOG is the appropriate optic


I actually have only seen one picture of an ACOG on a Block II M4 - the rest have had Elcan SU-230s or EOTech SU-231s.
"Soldier, you need to turn your ACOG off before the batteries die." - PMI Instructor, subject matter expert
Will816
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Posted: 7/7/2011 1:33:35 PM
Here's mine. I've recently replaced the old style VLTOR IMOD stock with a FDE newer style IMOD. Surefire M300A and a tan Eotech 553 are next on the list!

OIF_Vet08-09
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Posted: 7/7/2011 2:11:14 PM
Originally Posted By new-arguy:
http://farm6.static.flickr.com/5165/5731179141_ddc28037c1_b.jpg
http://farm4.static.flickr.com/3645/5730777992_c7b4686eee_b.jpg

Thanks for the new thread doc. I enjoy building clone guns and saw the MARSOC M4 in the MK18 thread a while back. I like it right away and went about building one. Mine is a real franken gun:
BCM lower that was IonBonded in brown
DD 14.5" mid length Govt profile barrel
DD RIS II M4A1 rail
BCM BCG
GunFighter Mod 4
Spikes stripped upper
PRI rear sight in brown
KAC front sight in brown
SF Flash hider
Magpul CTR
Magpul RSA
Magpul ASAP
Magpul MIAD
Aimpoint M4s w/ Aimpoint cantilever throwlever mount

I know the ACOG is the appropriate optic, but I shoot my guns with Aimpoints much more often and I had an extra M4s on a gun thats just been sitting in the safe. It was a real pain to find an upper in roughly the same color as the lower and rail. Lower and rail match pretty well, the upper has more of a green hue. Just as I was about to get a black upper to finish the gun, I came accross a guy who had a full Spikes gun in this color, but was selling the upper seperate. I asked if he minded if I bought the upper alone and replaced his with a black one. He didn't and that's how I wond up with this.

I've been shooting this gun a lot since I've built it, usually with the Surefire can. Shot it several times at our Friday night range outings, and at a few CFDCC matches. It's been great, and I expect to be shooting it a lot more!


That is one sexy rifle. Where did you get the Ion-Bond coloring done?
Fuck that noise, OP. Eat a fucking snickers bar and lay some fucking ground rules for that woman. Start with the kitchen.
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Mattyvac
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Posted: 7/7/2011 6:29:38 PM
[Last Edit: 7/9/2011 4:48:32 PM by Mattyvac]
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amuroray
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Posted: 7/7/2011 6:59:11 PM
which rear BUIS that the BLOCK II actually selected?

ARMS? KAC 300 / 600m? or .....

What about charging handle? PRI gas buster? or no selection?
js308
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Posted: 7/7/2011 7:11:29 PM
[Last Edit: 7/7/2011 7:14:03 PM by js308]
Originally Posted By Mattyvac:
Mine:

http://img.photobucket.com/albums/v404/dillsmod/P9140004.jpg

I know, not exact by much. It is an LMT though.

I need to strip the colorfill from the lower, get a RIS II instead of the MI 12", and switch the LMT BUIS for the KAC set.


Nope, that's not even the correct rail. The AR in the top of the picture would be a good Block 1 M4 clone though.
These threads always turn into general AR15 picture threads.
Just sayin
Mattyvac
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Posted: 7/7/2011 7:16:09 PM
Originally Posted By js308:
Originally Posted By Mattyvac:
Mine:

http://img.photobucket.com/albums/v404/dillsmod/P9140004.jpg

I know, not exact by much. It is an LMT though.

I need to strip the colorfill from the lower, get a RIS II instead of the MI 12", and switch the LMT BUIS for the KAC set.


Nope, that's not even the correct rail. The AR in the top of the picture would be a good Block 1 M4 clone though.
These threads always turn into general AR15 picture threads.
Just sayin


I know that rail isn't correct, the dd ris II is. If I got a 12" ris II with the kac sights, it would be a clone less the spikes lower and the t1.

mvician
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Posted: 7/7/2011 7:42:01 PM
Originally Posted By new-arguy:







Very NICE Neil
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Posted: 7/7/2011 7:43:23 PM

Thanks hellbound for the membership! I could learn a thing or two.
DocBach
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Posted: 7/7/2011 8:41:40 PM
Originally Posted By amuroray:
which rear BUIS that the BLOCK II actually selected?

ARMS? KAC 300 / 600m? or .....

What about charging handle? PRI gas buster? or no selection?


KAC and Matech are the two I've seen used. For charging handles I think GI issue and Gas buster are the only two with NSNs.
"Soldier, you need to turn your ACOG off before the batteries die." - PMI Instructor, subject matter expert
new_ak_fan
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Posted: 7/7/2011 8:54:43 PM
Originally Posted By DocBach:
Didn't want to clutter the Mk 18 thread with our M4's, so figure we might as well make our own thread dedicated to clones the latest and greatest high-speed low-drag M4A1 configuration with Block II components

Well, mine is not a complete rifle yet, but I decided to go with LMT as the basis of mine because we can't get Colts very easily here in CA. Right now I'm waiting on the Defender 2000 lower with tan SOPMOD stock to come in to my FFL and for Marvin Pitts to pin an NT4 flash hider on my 14.5" barrel to make it legal length. Planning on topping it off with a tan Elcan Specter DR SU-230, can't wait to finish it.

To anybody looking for a tan KAC flip up sight for their build, this guy has 2 left.



1 left. Thanks for the heads up. My Mod 1 is almost done.
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Posted: 7/7/2011 8:55:12 PM
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DocBach
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Posted: 7/7/2011 9:06:16 PM
[Last Edit: 7/7/2011 9:07:02 PM by DocBach]
To those wondering what makes an M4A1 a Block II model, here are some of the characteristics and equipment that the Block II M4A1s have:

Barrel:
14.5" M4 or SOCOM contour barrel

Flash Hider:
Standard A2 or KAC NT4

Rail System:
Early Block II M4A1s still used the KAC M4 RAS
DD RIS II in dark earth

Vertical grips
Tango down battle grip in tan
KAC

Rail panels:
Tango Down
KAC

Front sight:
KAC flip up in tan
standard front sight base (if early Block II with M4 RAS)

Optics:
Elcan Specter DR SU-230
EOTech SU-231-PEQ (553)

IR Lasers:
Insight AN/PEQ-15

Flashlight:
Insight M3 (SU-233/PVS)

Rear sight:
KAC 300m
KAC 600m
MaTech

Buttstock:
standard M4
LMT SOPMOD
"Soldier, you need to turn your ACOG off before the batteries die." - PMI Instructor, subject matter expert
FMJ
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Posted: 7/7/2011 10:05:09 PM
Originally Posted By DocBach:
Didn't want to clutter the Mk 18 thread with our M4's, so figure we might as well make our own thread dedicated to clones the latest and greatest high-speed low-drag M4A1 configuration with Block II components

http://i800.photobucket.com/albums/yy285/docrock184/DSC00222-1.jpg

http://i800.photobucket.com/albums/yy285/docrock184/DSC00223.jpg

http://i800.photobucket.com/albums/yy285/docrock184/DSC00224.jpg

Well, mine is not a complete rifle yet, but I decided to go with LMT as the basis of mine because we can't get Colts very easily here in CA. Right now I'm waiting on the Defender 2000 lower with tan SOPMOD stock to come in to my FFL and for Marvin Pitts to pin an NT4 flash hider on my 14.5" barrel to make it legal length. Planning on topping it off with a tan Elcan Specter DR SU-230, can't wait to finish it.

To anybody looking for a tan KAC flip up sight for their build, this guy has 2 left.


Nice

big 14.5 LMT fan

YHVH
Mattyvac
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Posted: 7/7/2011 10:14:56 PM
I just ordered an FDE RIS II and nut wrench. You can all go to hell
js308
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Posted: 7/7/2011 10:29:21 PM
[Last Edit: 7/7/2011 10:35:30 PM by js308]
Originally Posted By Mattyvac:
I just ordered an FDE RIS II and nut wrench. You can all go to hell


Nice Mattyvac, very nice!
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Posted: 7/7/2011 10:30:07 PM
Originally Posted By Mattyvac:
I just ordered an FDE RIS II and nut wrench. You can all go to hell


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Posted: 7/7/2011 10:31:53 PM
[Last Edit: 7/7/2011 10:32:29 PM by M4A1]
Originally Posted By DocBach:
To those wondering what makes an M4A1 a Block II model, here are some of the characteristics and equipment that the Block II M4A1s have:

Barrel:
14.5" M4 or SOCOM contour barrel

Flash Hider:
Standard A2 or KAC NT4

Rail System:
Early Block II M4A1s still used the KAC M4 RAS
DD RIS II in dark earth

Vertical grips
Tango down battle grip in tan
KAC

Rail panels:
Tango Down
KAC

Front sight:
KAC flip up in tan
standard front sight base (if early Block II with M4 RAS)

Optics:
Elcan Specter DR SU-230
EOTech SU-231-PEQ (553)

IR Lasers:
Insight AN/PEQ-15

Flashlight:
Insight M3 (SU-233/PVS)

Rear sight:
KAC 300m
KAC 600m
MaTech

Buttstock:
standard M4
LMT SOPMOD



Looks like the early stages of block 2 look a lot like block 1.
Can anyone confirm that block 2 still has some M4 profile barrels?
I thought socom barrels were all phased in by then.
DocBach
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Posted: 7/7/2011 10:43:22 PM
Early stages of Block II was a Block I with updated optics, lasers, lights ect. Pretty much stuff that didn't require an armorer to do like replace the rails.
"Soldier, you need to turn your ACOG off before the batteries die." - PMI Instructor, subject matter expert
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