Upper:
- Colt AF/Armalite M4 if rebuilt off SPR
- Colt Keyhole M4
- Keyhole Forge M4 black or FDE if full upper built by PRI

Barrel:
- Custom spun Heavy/SPR profile mid-gas from unknown blank
- Special Noveske 16" Recon, mid-length gas with custom heavier (~.742") profile in front of gas block for Ops Inc 12th Model, FDE coated (likely Duracoat, could be GunKote or Cerakote)

Gas Block:
- PRI .750 Black

BCG:
- Colt's M16 or other M16 contract replacement

Handguard:
- Precision Reflex 3rd Generation CF FF Handguard, rifle length, FDE [or Black if doing a full black upper but non-Noveske barrel]

CH:
- PRI Gas Buster M84 with military latch, black [Later pattern, no "welded" latch hotdog]
- Badger Ambi CH

Muzzle Device:
- Ops Inc 12th Model Brake and collar, and 12th Model suppressor

Scope Rings:

W/PRI Recce Rail:

- A.R.M.S. #22 Medium

- OPS rings

- Nightforce A107

- Badger 30mm Unimount

No Recce Rail

- LaRue LT-104

- A.R.M.S. #22 High

- Nightforce A203 (XX High) Or A110 (X High)

Bipod:
- Harris BRM-S with PodLoc
* A.R.M.S. #32
* KAC RAS bipod adapter
* LaRue LT-130 QD bipod adapter

- Atlas direct rail mount bipod BT-10
- LaRue LT-706/ Harris BRM-S combo
- VersaPods with ARMS #42 mount [claw or rubber feet]

BUIS:
- Black PRI [rarely if used if at all]
- ARMS #40 Standalone rear

Lower

Rcvr:
- Colt's or GM Hydramatic M16A1 (Anniston Depot markings on some)

Grip:
- A2
- Magpul MIAD
- Tango Down
- Ergo
- Sierra SPR

Trigger:
- Accuracy Speaks Full Auto Match
- KAC Adjustable F/A 2-stage
- Geissele SSF

Selector:
- DPMS Ambidextrous full-auto (old gen, ca 2000-2003 timeframe)
- Standard M16 style

Buttstock:
- ACE SOCOM Carbine or Rifle length - Gens 1-3
- SOPMOD Gen 1 or 2 [black or tan]
- Magpul
* ACS
* PRS
* CTR

Optics:
- Leupold 3-9x36 M3 TS-30A2 Illum Mildot
- Mk4 MR/T 2.5-8x36 M2 (with or without TS-30A2markings), Illuminated MilDot OR TMR reticle
- Leupold Vari-X III 3.5-10x40 LR, M3 turrets, Illuminated Mil-Dot reticle
- FDE Leupold Mk4 3.5-10x40, M2 turrets, Illuminated TMR (ala M110)
- S&B Short-Dot
- Bushnell SMRS 1-8
- Leupold Vari-X III LR M3 with Premier Reticles Gen 2 MilDot conversion [in LT-104 Mount]

Notes:

There are 3 rough iterations of the Mod H:

1)First handful were built at SOTIC armory directly by MSG Holland and another gentleman, using COTS parts ordered from Brownells etc. The one we can see closely had a black Colt Keyhole forged upper, black PRI Gen III handguard rifle length, and a black PRI Recce Rail. The barrel was unmarked, with a heavy/SPR profile, mid-gas, and OPS profile, and coated black. Only 2 of this type have been photographed, one of which may have actually had a Noveske barrel.

2)The second, larger grouping of Hollands were rebuilds of original SPRs. These can be distinguished as they all have FDE Gen III handguards, and retained the upper and lowers from the SPRs, often identified in that the upper and lower have matching worn rattlecan paint but the handguard is unpainted. Often the optics, suppressor, etc matched the upper/lower. These had the Noveske FDE barrels. Non rattlecanned ones you can identify by their uppers being Colt AF forgemark or Armalite (haven't seen one, but likely in the mix).

3)The third iteration apparently were assembled by Precision Reflex, with them supplying new parts for the entire upper. These had Keyhole forge contract uppers coated in FDE, FDE Gen III handguards, FDE Noveske barrels, contract M16 BCGs. These likely were supplied with the Recce Rails, maybe with PRI back-up irons as well (though apparently rarely even used).

Photos



























I would like to give a special thanks to 18E3V and Nikiel09 for the information about the "Holland" program that they have given over the years in the MK12 thread.  I would also like to thank HaveBlue83 and the other members  who helped in creation of this thread

@KavonTN, is this the SMRS FFP? How is it? This is what I think I'll end up with on my Holland

Nvm, just noticed the Vortex logo..also, I dig the Jeep

Anyone running the SMRS 1-8?

Edited (again...) for page ownage
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Nah, its the vortex 1-10. I haven't had a chance to shoot it yet but its pretty slick.

Yeah, noticed the Vortex logo after I pulled the trigger on the post. I may have an untrained eye to them...but without close examination of the photo, that scope looks pretty identical to the SMRS 1-8.

Check out page 26 of this thread  https://www.ar15.com/forums/AR-15/Official-Mod-H-Holland-Picture-and-Discussion-Thread/118-703269/?page=26   @chenault had a Bushnell SMRS.

Right on, thank you

Getting out for some fresh air today
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Not dialed in perfect yet since rings will be swapped again soon, only at 100yds for now
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1000yd range today. mod H is good for 800 on 8x

Impatiently waiting for my wrong caliber barrel to show up so I can finish this thing.

Wrong scope long hair don't care middle finger in the air

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hey u painted my stock!

Haha yes I did

*brain aneurysms in silence*

finished the mod H

Most excellent. My AEM5 should be here any day now.

Lunch break with wife

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Old pic from last year, haven't shot it since then or anything for that matter

this thread needs some love

I agree..
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After an almost 3 month wait (backorder) I finally got an email notification from Pri that a shipping label was created!
My Mod H upper should be here this week!!!

Just picked up my AEM5 so I'll post up soon.

What height nf rings are those?

1" A101

Mod-H upper in hand!

As soon as the weather breaks I'll give her the khaki base coat and then I'll try my hand at a pinestraw pattern with OD green.
Gratuitous pics of my mock up thus far. (Disclaimer- I'll be running an incorrect scope for the time being)



And before anyone asks, yes, my AEM5 is in jail.

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Not sure if i want to keep the 3-10 or go back to the 2.5-8x36 yet.

Not showing up for me. Let me help u with that

Good looking stick
I’d definitely stick with the 3.5-10

I'd have to agree with that, the 3.5-10 looks good on there.
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Fuck me! 2020 sucks a big one. My mother died of cancer earlier this year. "Pandemic, pandemic, pandemic"..all over the news media ....




Assembling my upper with this barrel https://bisonarmory.com/16-recon-6-8-spc-stainless/ and discovered it isn't contoured back 2.4" as shown here http://aesuppressors.com/images/sprdrawing.jpg  only around 1.25". So I can't mount the collar. Bison shows pics of two contours on their site, one at the bottom of the page appears to be cut back far enough, didn't notice until today.  

I paid extra for the FDE finish also.

If I didn't work at a "secure" government facility I would take it to work and put it in a four jaw chuck and just turn it back myself. I have no access to machining equipment outside of work.

To add insult to injury I just found out the card I purchased for my new camera has too many GB, so I can't post any pics yet. It didn't say a damn thing in the manual that shipped in the box but the one online says 32GB max. Fuck Kodak too.

Sorry for the rant. I have been purchasing parts and planning this build for a long while as the fun budget allows. Saw this on Bison's site... " Compatible with Ops Inc. / Allen Engineering brake & collar silencer systems" ...you know what they say about ASSuming.



ETA: I am not putting down Bison Armory. The barrel looks great, very clean machining, beautiful rifling, I hope it shoots as good as it looks. Just a warning to folks to check your stuff before you torque down the barrel and install the gas block.

Looks great. What color did you use on the H?

The description says it’s compatible, I’d go on that rather than the pic. Also, if it’s not compatible and is like the pic, most barrels can’t just be turned back and made compatible with the AEM5 collar. The collar is designed to work off the dimensions of the gas block journal, barrels that are compatible with AEM5 collars basically have a really long gas block journal. The portion of the barrel between a normal, short gas block journal and muzzle is too narrow for the collar, so even if it has that step at the muzzle, it won’t work. The collar will just fall down the thick part. Adco schooled me on that when I asked them to turn down a 16” Rainier Ultramatch barrel for the AEM5 collar

It can be turned back, I measured everything after the fact, all diameters are good just the step is too close to the muzzle. I wonder if Bison cut it for the M4 AEM5 collar http://aesuppressors.com/mounts/ ? I have the long MK12 SPR collar.

I wanted this barrel for a few reasons, I have wanted a larger caliber AR for a while and was going to do an M4 build in this caliber but when I found out Sgt Holland had a big hand in the development of the 6.8 SPC cartridge and this Mk12 variant it seemed like a no brainer.


ETA: From muzzle to step 1.270" . Step diameter 0.725". Behind the step diameter 0.745" (0.0035" below minimum spec on A.E. drawing) Gas block journal 0.7495". Inside diameter of collar where it engages the step is 0.729" measured with a dial caliper.  http://aesuppressors.com/images/sprdrawing.jpg

Thanks. Its a Valspar (Lowe's exclusive i believe) outdoor spray paint thats sadly been discontinued in my AO.
Its a great color for a rifle and was my last can.

That’s precisely what he did. Way back Ben used to use a profile that was surprisingly close to the real Hollands. He changed the profiles to the one you have there and didn’t update the pics before I purchased a 5.56 barrel. When I messaged to go “wth?” He stated I could use the M4 AEM5 collar. Not exactly good for a clone, and now discontinued unless purchased direct from Ron with measurements.

At any rate the exchange we had and a community push after led to the AEM5 profiled 5.56 barrels returning, but unfortunately with this new profile versus the more correct early one.

Where are y’all getting your AEM5’s?

I'd start signing up for the in-stock notifications at the usual places (Capitol Armory, PSD, Thoroughbred). Get one while you can, Ron is retiring next year.

eSilencers

https://www.esilencers.com/product/allen-engineering-aem5-knurling/

Thinking of doing a Mod H URX4 inspired in 6.5 grendel, with an AE30 of course.

I see that BA does and SPR profiled 16" barrel.

Has anyone done this (6.5G) and is the BA barrel cut correctly (for the collar) and is it any good (accuracy wise)?

I wanted do something in 6.8 SPC (another project from Steve Holland), but couldn't find a collar and brake setup in 5/8-24 thread pattern.

The announcement of Ron retiring is what is making me accelerate this project.

All the 5/8×24 .30cal muzzle brakes are OOS so I would have to order direct from him.

Somewhere floating around is a pic of my 6.5 Grendel URX4 with a standard length (but larger caliber) AEM5.  

The BA 6.5G 16" SPR barrel states in description it has the right step, but every pic I've seen has just been a .700x.700 step. I'm leery of them.

Yeah, looking at the pics it doesn't look like the step is far enough back. I could always get it machined back if needed.

Did you have Ron make you the larger cal AEM5? Does it use a 1/2x28 muzzle break but bored out to the correct cal?

Did you do a write up on your rifle? Extremely interested, if you did.

ETA Off to search!

Yes, I did. He made me a 6.8 Caliber short stack AEM5.  I've been sticking with 5/8x24 threaded barrels.

The rifle was more of a mockup than anything serious. Terrible pictures.  I just threw it together quickly to get a sense of what a URX4 Holland would look and feel like. Pretty sure it was the first clone, though.

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NICE!!!!

Last question then I'll leave you alone (for now ), which barrel did you use?

ETA Pretty sure I'm semi retarded and misread how the AE30 attaches. No muzzle brake needed, only a 20* step 2.5" back from the muzzle or a collar same distance back.

It's direct thread to 5/8x24 barrels, yes?

Yep

Thanks.

Very nice.

https://www.precisionreflex.com/Detail.aspx?PROD=186717

PRI shows the 5/8 threaded brake in stock. The one I purchased came with a short collar.


AE can make an AEM5 can bored for 6.5g, 6.8spc, .300 blackout... just have to call and order direct

You're a bad person and an enabler, thanks.

Talking to Ron right, now via email, about a can in 6.8 but closer to AEM5 length.

ETA Muzzle brake is ordered. Too late to turn back now.

Probably going to have CLE turn a Douglas barrel 16", 6.5G, and in MK12 profile.

Nice. This got me thinking of building one again. Maybe for next year.

https://imgur.com/gallery/asxb6GP

Finally finished!

Nice.