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Posted: 7/7/2011 12:07:43 PM EDT
[Last Edit: Lancelot]
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 Suppressors: KAC NT4 Surefire SOCOM RC 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  Attached File Attached File
 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 |
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AK, USA
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Posted: 1/24/2018 5:50:26 PM EDT
[#1]
Quote HistoryOriginally Posted By GoatBoy:
https://www.ar15.com/media/mediaFiles/1/nra-lifetime-membership-415608.jpg
The NRA life memberships are on sale until March 15th at $600. This gets you a vote for your board members every year. For those who are upset with the NRA, it is the only organization with the power to enact massive changes and protect our freedoms. The way to fix the NRA is the same way to fix this country, VOTE! The more of us with a voice, the stronger changes we can enact. This is a chance to get yourself or your spouse a membership and an extra vote. Expand our base and vote in pro-black rifle board members who will represent our interests!!!! Head to this link to sign up! |
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Posted: 1/24/2018 6:04:37 PM EDT
[#2]
Quote HistoryOriginally Posted By Testing223: |
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Posted: 1/24/2018 6:45:14 PM EDT
[#3]
Quote HistoryOriginally Posted By prskiller:
That FN is phat! I wonder if they make a 14.5 barrel like that 10.3? |
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Posted: 1/24/2018 6:48:18 PM EDT
[#4]
Colt 14.5 SOCOM barrel showing back in stock at brownells. Price is 308 but code NDF takes $30 off with free shipping. Not the best price but haven’t found anyone else with them in stock
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MO, USA
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Posted: 1/24/2018 8:20:28 PM EDT
[#5]
Quote HistoryOriginally Posted By AR_Marv:
Colt 14.5 SOCOM barrel showing back in stock at brownells. Price is 308 but code NDF takes $30 off with free shipping. Not the best price but haven’t found anyone else with them in stock 
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Posted: 1/24/2018 8:37:43 PM EDT
[Last Edit: Infidel4life11]
[#6]
Originally Posted By AR_Marv:
Colt 14.5 SOCOM barrel showing back in stock at brownells. Price is 308 but code NDF takes $30 off with free shipping. Not the best price but haven’t found anyone else with them in stock Originally Posted By ckopp636: Ive been waiting for these to be in stock and when one popped up on gunbroker for $320, I jumped on it even though its over priced. Go figure that brownells gets them back in stock the day after I order one and have coupon code on top of it. I got an upper from brownells only for the rail and the receiver sold quick, but I guess nobody is interested in 16 inch government barrels anymore because its listed pretty cheap with no interest. This block 2 build is really putting a hurting on me |
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Posted: 1/24/2018 8:43:23 PM EDT
[#7]
Quote HistoryOriginally Posted By Infidel4life11: I think *************** have them for $285 |
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MO, USA
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Posted: 1/24/2018 8:49:16 PM EDT
[#8]
Quote HistoryOriginally Posted By DontBuryMe: Just as a heads up- posting that particular vendor is a no-go here, for better or for worse. They have a bad history here, especially with staff. |
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Posted: 1/24/2018 9:06:05 PM EDT
[#9]
Originally Posted By DontBuryMe: Just as a heads up- posting that particular vendor is a no-go here, for better or for worse. They have a bad history here, especially with staff. Originally Posted By ckopp636: They are out of stock there and as stated, I thought they had a bad reputation around here. I had been checking everywhere daily for this barrel. the place i got my barrel from upped the price 100 bucks today so i guess they are proud of them |
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GA, USA
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Posted: 1/24/2018 9:16:01 PM EDT
[#10]
Quote HistoryOriginally Posted By AR_Marv:
Colt 14.5 SOCOM barrel showing back in stock at brownells. Price is 308 but code NDF takes $30 off with free shipping. Not the best price but haven’t found anyone else with them in stock |
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Posted: 1/24/2018 9:19:30 PM EDT
[#11]
Sorry Timbo
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MO, USA
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Posted: 1/24/2018 9:49:26 PM EDT
[#12]
Well, I havnt made the best moves with acquiring parts for this build, but all parts are in route. I have the non fsp rail and an upper receiver already. My plan is to shave the colt front sight rather than use a low pro block.
Parts list will be Colt complete lower DD FDE RIS II non fsp Colt 14.5 socom barrel w/spacer and a2 fh (have no intentions to suppress it) Aero upper receiver Toolcraft bcg KAC micro 600m rear sight MBUS Pro front sight (stand in for the time being unless I really like it) Optic will likely be a leupold mark ar mod 1 1.5-4x20 because Id like to try one out. Not a real "clone", but pretty close. |
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Posted: 1/25/2018 10:02:42 AM EDT
[Last Edit: Infidel4life11]
[#13]
Quote HistoryOriginally Posted By huey_crew_chief:
Just an FYI that the the add says the front sight tower is not "F" marked. Quote HistoryOriginally Posted By huey_crew_chief:
Originally Posted By AR_Marv:
Colt 14.5 SOCOM barrel showing back in stock at brownells. Price is 308 but code NDF takes $30 off with free shipping. Not the best price but haven’t found anyone else with them in stock I just zero'd my irons last weekend with a whopping 3 clicks of windage to the right. With a 2017 barrel, FSP lacking the "F" mark. |
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Posted: 1/25/2018 10:37:38 AM EDT
[#14]
Wonder if we'll eventually need a block III thread...
 Geissele Socom Upper Receiver Group, SSP & Super 700 Triggers - SHOT Show 2018 Day 1 |
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Posted: 1/25/2018 10:41:58 AM EDT
[#15]
Quote HistoryOriginally Posted By carmodyh:
Wonder if we'll eventually need a block III thread...
 https://www.youtube.com/watch?v=mJilPVnvXSoOfficial-M4A1-USASOC-URG-I-Clone-and-Picture-Thread CD |
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Posted: 1/25/2018 10:52:27 AM EDT
[#16]
Quote HistoryOriginally Posted By Infidel4life11:
The latest batches of the Colt SOCOM's haven't had the "F" mark. The are the correct FSP they just lack the marking. My last 3 Colt SOCOM barrels have been like this since they went to the "Cage Code" markings instead of the Colt Roll mark. I just zero'd my irons last weekend with a whopping 3 clicks of windage to the right. With a 2017 barrel, FSP lacking the "F" mark. Quote HistoryOriginally Posted By Infidel4life11:
Originally Posted By huey_crew_chief:
Originally Posted By AR_Marv:
Colt 14.5 SOCOM barrel showing back in stock at brownells. Price is 308 but code NDF takes $30 off with free shipping. Not the best price but haven’t found anyone else with them in stock I just zero'd my irons last weekend with a whopping 3 clicks of windage to the right. With a 2017 barrel, FSP lacking the "F" mark.  Attached File |
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TX, USA
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Posted: 1/25/2018 12:17:42 PM EDT
[Last Edit: henryfrank]
[#17]
Has anyone seen the Surefire Warden in use by Socom members? It fits the SF hiders/brakes and might further reduce concussion without the weight or length of a suppressor, but never seen one in the military pics.
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Posted: 1/25/2018 12:33:49 PM EDT
[#18]
Quote HistoryOriginally Posted By henryfrank:
Has anyone seen the Surefire Warden in use by Socom members? It fits the SF hiders/brakes and might further reduce concussion without the weight or length of a suppressor, but never seen one in the military pics.  Attached FileCD |
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Posted: 1/25/2018 12:34:23 PM EDT
[#19]
Quote HistoryOriginally Posted By henryfrank:
Has anyone seen the Surefire Warden in use by Socom members? It fits the SF hiders/brakes and might further reduce concussion without the weight or length of a suppressor, but never seen one in the military pics. |
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Posted: 1/25/2018 12:48:21 PM EDT
[#20]
Quote HistoryOriginally Posted By AR_Marv: Thought I had heard or read somewhere that they weren't coming with F marked sight bases but they were the correct height. On the Brownells product page though it says it's the non F marked height 1.940". Glad to hear it zeroed with no problems. https://www.AR15.Com/media/mediaFiles/465788/Colt-430879.JPG |
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TX, USA
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Posted: 1/25/2018 1:03:25 PM EDT
[#21]
Quote HistoryOriginally Posted By Combat_Diver: I have not, just these three plus the Yellow blank adapter. Someone else may have better luck for you. https://www.AR15.Com/media/mediaFiles/32677/IMG_0341_rz-430960.JPG CD |
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Posted: 1/25/2018 1:06:56 PM EDT
[#22]
Quote HistoryOriginally Posted By henryfrank:
Thanks CD. Figured as much but wanted to check. What's that lower one? Don't think I've seen one of those. |
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Posted: 1/25/2018 1:13:51 PM EDT
[#23]
Quote HistoryOriginally Posted By cjwwd2: SOCOM Mini Monster CD |
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Posted: 1/25/2018 2:01:49 PM EDT
[#24]
Quote HistoryOriginally Posted By Combat_Diver: Only one National Guard ODA has shown up with them. CD |
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TX, USA
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Posted: 1/25/2018 4:02:20 PM EDT
[#25]
Quote HistoryOriginally Posted By cjwwd2: SOCOM Mini Monster
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BC, CAN
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Posted: 1/25/2018 4:47:21 PM EDT
[#26]
So I picked up this offset mount for my B2 M4A1 upper and am having trouble finding any info on it. I know it is the same style as the Predator mounts and am assuming the logo engraved on it probably stands for Matt Burkett? I've never seen one with the two allen screw cross bolts and the solid "wings" to protect the red dot. I'm just wondering where this mount fits in the timeline of the different generations and if this style has ever been seen in use.
Also wondering for those that have used this style of mount if there is any significant difference between the Doctor Red Dot and Insight MRDS, does one greatly outperform the other? Thanks in advance! |
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Posted: 1/25/2018 8:29:03 PM EDT
[#27]
Quote HistoryOriginally Posted By StevieJ309:
No. It may reduce concussion, but it also produces a huge fireball. Quote HistoryOriginally Posted By StevieJ309:
Originally Posted By henryfrank:
Has anyone seen the Surefire Warden in use by Socom members? It fits the SF hiders/brakes and might further reduce concussion without the weight or length of a suppressor, but never seen one in the military pics.
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Posted: 1/25/2018 9:38:13 PM EDT
[#28]
Quote HistoryOriginally Posted By aaron580:
Thats interesting. Have you ever seen a full size version around? Quote HistoryOriginally Posted By aaron580:
Originally Posted By Combat_Diver: Only one National Guard ODA has shown up with them. CD CD |
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Posted: 1/25/2018 9:43:34 PM EDT
[#29]
Quote HistoryOriginally Posted By Combat_Diver:
Won't the full size version be the Standard SOCOM? They only had one or two of the Mini SOCOMs. CD Quote HistoryOriginally Posted By Combat_Diver:
Originally Posted By aaron580:
Originally Posted By Combat_Diver: Only one National Guard ODA has shown up with them. CD CD 
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IA, USA
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Posted: 1/26/2018 12:06:43 AM EDT
[#30]
I took advantage of the nice weather we've been having and ran a few hundred rounds through the Block II
. Shooting some paper and plinking at clays on my backstop, this easily continues to be my favorite gun to shoot:
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Posted: 1/26/2018 2:49:20 AM EDT
[#31]
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Posted: 1/26/2018 9:27:16 AM EDT
[#32]
Quote HistoryOriginally Posted By GHPorter:
Sir, is there any truth to the rumor that those bent barrels came from folks using bayonets to cut crate strapping and the like? If not, why were the barrels bending? Years later , I determined the drop gages were getting stuck 90% of the time by bullet jacket material "mounding up" on the muzzle side of the gas port. This was fixable by a new bore brush being chucked in an electric drill with an appropriate length of bore rod and a few minutes of working it back and forth in the gas port area while the drill was working. |
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Posted: 1/26/2018 11:29:18 AM EDT
[Last Edit: JJREA]
[#33]
Could you explain what a drop gauge is? I didn't know what that meant exactly and how that might bend barrels.
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Posted: 1/26/2018 11:45:44 AM EDT
[Last Edit: Combat_Diver]
[#34]
Quote HistoryOriginally Posted By JJREA:
Could you explain what a drop gauge is? I didn't know what that meant exactly and how that might bend barrels. STEEL,CLASS 440B OR 440C, 6.482 O/A LG; 0.215 IN. DIA BOTH ENDS Another use of the gauge is to check alignment of the barrel, FH and Suppressor. Surefire sales these as Alignment gauges. CD |
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Posted: 1/26/2018 3:23:57 PM EDT
[#35]
Aaaah, thank you.
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IN, USA
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Posted: 1/26/2018 5:52:58 PM EDT
[#36]
I cant tell if I want to build a RIS FSP or non-FSP. I have both rails and Im not sure which way to go with it.
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IA, USA
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Posted: 1/26/2018 6:04:49 PM EDT
[#37]
Quote HistoryOriginally Posted By footsoldier9th:
I cant tell if I want to build a RIS FSP or non-FSP. I have both rails and Im not sure which way to go with it.  ...
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Posted: 1/26/2018 6:05:59 PM EDT
[#38]
Quote HistoryOriginally Posted By footsoldier9th:
I cant tell if I want to build a RIS FSP or non-FSP. I have both rails and Im not sure which way to go with it.
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IN, USA
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Posted: 1/26/2018 6:07:39 PM EDT
[Last Edit: footsoldier9th]
[#39]
Yep, pretty much what the little voice in my head is saying. F it do both....treat yo self
Quote HistoryOriginally Posted By sbye:
You've been here long enough to know the correct answer. Build both |
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IA, USA
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Posted: 1/26/2018 6:21:01 PM EDT
[#40]
Quote HistoryOriginally Posted By footsoldier9th:
Yep, pretty much what the little voice in my head is saying. F it do both....treat yo self 
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IN, USA
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Posted: 1/26/2018 6:37:50 PM EDT
[#41]
Exactly what I was thinking! Beautiful
Quote History |
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Posted: 1/26/2018 8:38:33 PM EDT
[#42]
Quote HistoryOriginally Posted By coldblue:
Not opening crate strapping, but aggressive bayonet training against telephone poles and slamming against rappelling tower walls were the most popular theories. Years later , I determined the drop gages were getting stuck 90% of the time by bullet jacket material "mounding up" on the muzzle side of the gas port. This was fixable by a new bore brush being chucked in an electric drill with an appropriate length of bore rod and a few minutes of working it back and forth in the gas port area while the drill was working. Thanks for the insight, sir. |
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IN, USA
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Posted: 1/26/2018 9:54:36 PM EDT
[#43]
Would a block II with the RIS II (non FSB) rail have the SOCOM barrel or the standard m4 profile barrel?
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Posted: 1/26/2018 10:05:28 PM EDT
[#44]
Originally Posted By ckopp636: They are out of stock there and as stated, I thought they had a bad reputation around here. I had been checking everywhere daily for this barrel. the place i got my barrel from upped the price 100 bucks today so i guess they are proud of them |
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Posted: 1/26/2018 10:05:38 PM EDT
[#45]
Quote HistoryOriginally Posted By footsoldier9th:
Would a block II with the RIS II (non FSB) rail have the SOCOM barrel or the standard m4 profile barrel? |
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Posted: 1/26/2018 10:06:42 PM EDT
[#46]
Quote HistoryOriginally Posted By footsoldier9th:
Would a block II with the RIS II (non FSB) rail have the SOCOM barrel or the standard m4 profile barrel? |
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Posted: 1/26/2018 10:10:17 PM EDT
[#47]
Originally Posted By dalynchmob:
I took advantage of the nice weather we've been having and ran a few hundred rounds through the Block II . Shooting some paper and plinking at clays on my backstop, this easily continues to be my favorite gun to shoot:
http://i65.tinypic.com/2cdxuf8.jpg http://i63.tinypic.com/2reu0lu.jpg Originally Posted By footsoldier9th:
I cant tell if I want to build a RIS FSP or non-FSP. I have both rails and Im not sure which way to go with it. |
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Posted: 1/26/2018 10:13:37 PM EDT
[Last Edit: 871JZ]
[#48]
@Combat_Diver
Those fat little 10.3" FN barrels are SOCOM/M4A1 profile minus the flats, correct? It seems like I read a couple posts insinuating that they were different, but they appear to be SOCOM profile to me. |
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Posted: 1/26/2018 10:16:51 PM EDT
[#49]
Quote HistoryOriginally Posted By 871JZ:
@Combat_Diver Those fat little 10.3" FN barrels are SOCOM/M4A1 profile minus the flats, correct? It seems like I read a couple posts insinuating that they were different, but they appear to be SOCOM profile to me. |
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IN, USA
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Posted: 1/26/2018 10:18:31 PM EDT
[#50]
Got it thanks
FSP- SOCOM BARREL NON FSP - M4 government profile Quote HistoryOriginally Posted By pezboytate: Probably a 99% to 100% chance it would be regular M4. |
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