MK 12 Picture & Discussion Thread

thehun

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Mar 24, 2018
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While not 100% clone correct, this is my Mk12 Mod 0-ish clone.

It is BY FAR my favorite platform in the AR world. Shoots regular ball ammo extreeeemely well while being able to get my Mk12 itch.

Setup:

Anchor Harvey M4 Upper
FN CHF/CL 18" Rifle Gas 1:8 .223 Wylde Chamber with Mk12 brake
ToolCraft NIB BCG
PRI Gen 3 Mk12 Tube with Full 1913 rail
PRI Folding Mk12 FSB
ARMS Wingless #40 Rear
PSA Ambi CH
POF Ambi Selector
KAC Legacy 2-Stage NSN Trigger
Harris Bipod
KAC VFG
Bushnell Nitro 3-12X44 with Deploy MIL (solid scope with a very usable reticle)

My very own krylon paint job.
WM5gLa8.jpg

Group with Monarch Brass .223:
w599QmE.jpg
 
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mallen45

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I've got the itch to part with my Nightforce 42mm in favor of going clone correct. If anyone's tired of using their Leupold TS30 let me know if you want to swap out.
 

The Durk

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Project Clone MK262 worked like a charm. No more spending $1.30 a round for black hills.
 

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Longshot85

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Project Clone MK262 worked like a charm. No more spending $1.30 a round for black hills.
Nice, what all did use for relaoding components?

Powder, charge weight, primer and smk vs tmk?

Thanks and good results
 

The Durk

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Remember folks, my load info might not work for you. I took a look at the mk262 videos from Johnys Reloading on YouTube. He was doing 23.2g and getting nasty pressure signs. Mine was not having that issue so I bumped it up a tenth of a grain, and the juice was worth the squeeze.

Lake City brass trimmed to minimum length, CCI 41 primers, 23.3g of AR Comp (compressed load) sitting under a 77g SMK w/cantelure and slight crimp. OAL is 2.246.


A lot of people would get their feelings hurt to know I’m using a bootleg BCG that’s adjustable for suppressor use. I swear that has something to do with how less beat up my brass comes out.
 

gamewarden

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Mar 19, 2012
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MSTN Mk12 Mod 2
MSTN built upper
Custom Noveske factory built lower (vltor A5)
Geissele SD-E
 

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Alaska

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I built a MK 12 Mod 0 got it completed in 2011.
since I have upgraded the bolt to Sharps Reliable Bolt and put a Roller Cam Kit on the Carrier I replaced the Buffer Spring with a Braided 3 Wire Buffer Spring and replaced the A2 Buffer with a Hydraulic Kynshot Buffer.
everything else is spec. Sure is a good rifle.
 

CrowCommand

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If anyone is looking for an ARMS #40 rear sight, I have a like new one I am replacing with the #40 L.
 

Alaska

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Nice, what all did use for relaoding components?

Powder, charge weight, primer and smk vs tmk?

Thanks and good results
77gr SMK
IMR 8208 @ 23.8
CCI 41
cOAL 2.245”
LC Brass
light crimp with Lee factory crimp die
2750 FPS in 18” MK 12
 
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Alaska

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I've got the itch to part with my Nightforce 42mm in favor of going clone correct. If anyone's tired of using their Leupold TS30 let me know if you want to swap out.
Oh No my TS 30 has been on mod 0 for 10 years now I would like to have a clip on PVS 22 and Allen Can
 
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THEOZZ

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    Took my Grandson out to the range today. He shot the LMT MK12ish out too 200 yards. I took a video of the 2 shots but didn't think to take a video of him before the shot. No I wasn't a cheap ass only only gave him 2 rounds to shoot it was just his final 2 shots. Always a great time taking him to the range.

     
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    SpringThom

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    Jun 20, 2020
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    Not trying to steal any thunder from ARFCOM, but I can't hardly stand to get on there anymore. Figured there may some interest in a MK12 picture and discussion thread on here. I'll start:

    Lower: Nodak Spud M16A1 'black' lower, Geissele SSA-E trigger, Colt A-1 grip and stock (trapdoor), Fulton Armory A1 extension with buffer and spring, Colt no-tic safety selector, no name milspec LPK

    Upper: Colt AF forged M4 feedramp upper, tear drop FA, PRI Gasbuster charging handle with .mil big latch. Colt BCG. A.R.M.S. #40 rear with bonus point wingless swan logo, A.R.M.S. #38 SPR-PEQ 2-3 rail, Douglas barrel 1:7 twist, PRI milled flat flip up gas block, Colt gas tube, A.R.M.S. #22 M rings, Leupold MK 4 2.5-8 M/RT with M2 dials. Actual old stock Ops brake and collar. Allen Engineering AEM5. KAC bipod adapter with Harris BRMS and pod loc. KAC sling mount with Uncle Mikes sling stud. Oh and a A.R.M.S. TRC ring cap and rail.

    This is my best effort at a late gen Mod 0. Big upgrades would be a Colt M16A1 lower (my birthday is coming up if anyone is feeling generous) and the original OPS 12th can.
    This is an absolutely beautiful build! I love the paint especially. I've got a few receiver sets from Precision Reflex and plan to build one similar to the Mk12 Mod 0, but with a match barrel.

    Do you have any other projects going on?
     

    LANCER

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    Jul 24, 2014
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    This is a gorgeous rig! Wow!

    Could you share the build list please?
    Thanks, but it's not anything special. Nothing except the PRI rail and barrel/sight block/trigger are clone correct. Receiver is a NP3 set from Spikes, Geissele HSNM DMR trigger, Barrel is a Rainier Match SPR profile 1:8 that has been bedded, and scope is a cheap Athlon 3-15x something or other. I used to run a bog standard phosphate BCG but it has a JP FMOS group in it now. It shoots my 262 clone loads right under .75 MOA and gets out to 700 pretty easy unless there is even a tiny bit of wind :) I Cerakoted everything in Troy Coyote. I regret painting it, should have left it black. Also I failed to get the AEM-5 can while they were still in stock, and I was told that Allen is retiring and won't be making any more. I want to build a Mod 1, but I'll be using a CLE Krieger barrel for it.
     
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