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Tungsten's CQBR build... MK18 Clone


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Going to use this thread to track my progress building an SBR (short barrel rifle) AR15 based loosely off of the MK18 used by the US Navy SEALS. I wanted something a little different so this is the route I decided to take. :rolleyes:

MK18_01.jpg

I've accumulated most of the parts and am submitting my paperwork for the beloved BATFE tax stamp so that I can assemble them into a functioning short barrel rifle. A few parts still remain but should be in place by the time the tax stamp comes back.

Red highlight indicates items I lack.

  • LMT 10.5" upper receiver
  • CMT bolt carrier group
  • Spike's Tactical lower receiver - NFA engravings
  • Magpul MIAD - dark flat earth
  • Magpul aluminum enlarged trigger guard
  • Magpul CTR milspec - dark flat earth
  • LMT milspec 6 position buffer tube
  • Carbine weight main action spring
  • Carbine weight buffer
  • YHM ambi hook endplate
  • LaRue 7.0 quad rail forend
  • LaRue quick release EOTech riser
  • LMT tactical rear sight (re: MK18)
  • DPMS lower parts kit
  • DPMS ambidextrous fire control lever
  • KNS anti rotation pins
  • EOTech 512 AA optic
  • Vickers Tactical combat application sling - coyote brown
  • Tango Down stubby vertica fore grip - dark flat earth
  • Magpul XT rail covers - dark flat earth
  • YHM Phantom flash hider for suppressor
  • YHM Phantom Stainless 5.56 suppressor

I decided to skip the SOPMOD stock in favor of the CTR. I had a CTR on my old rifle and really liked it. I did opt to go with the milspec buffer tube and CTR this time, however.

I also decided to skip the Aimpoint optic in favor of the EOTech. Personal preference.

Before someone notes that I opted for a dual point sling and mentioned using an ambi-hook end plate more commonly reserved for a single point sling, I'm giving myself the option of running a single point sling with HK claw attachment later if I want. No sense having to bust the buffer tube's castle nut loose after it's torqued and staked just to install another end plate later.

I hope to pick up the LMT upper during the second half of July and maybe the LaRule rail and EOTech in August. Since my wife and I are expecting our first child in January, this will be my last big hurrah until after the baby expenses are over.

Maybe. :D

Edited by TGO David
Updated parts list
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Guest Verbal Kint

I'd rethink that BCG and go with the BCM group (MPI'd) in Auto. Same one I ordered last week after doing some research and looking around. :rolleyes:

And I'd opt for an H-buffer with the 10.5" setup.

And... well... I'll wait and let other people bitch about stuff first.

Edited by Verbal Kint
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  • Administrator

The photos in that thread (re: CMT BCG with sheared screws) looks like the screws were at fault and not the other hard parts. Someone may have taken it apart for some reason and then re-used the original screws rather than replace them like you're supposed to.

:rolleyes:

I'll just see about an LMT or BMC group instead if that thread shows up significant evidence that CMT blows goats. Everyone produces a lemon every once in a while. :D

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Looks like you will have a very solid rifle when complete.

(with all that high zoot gear, I dont want to hear you bitching about not having any gun money anymore :rolleyes: )

Added:

Are you going with the MRP upper like mine? or one of their standard uppers?

IMG_0171.jpg

Edited by BimmerFreak
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  • Administrator
And I'd opt for an H-buffer with the 10.5" setup.

Meh... some folks say shoot it first with a regular carbine buffer and see how it feels. Buffers are cheap. If it needs a heavy buffer, I'll add one later. It's also going to depend a little on how it cycles with the suppressor attached.

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  • Administrator
Looks like you will have a very solid rifle when complete.

(with all that high zoot gear, I dont want to hear you bitching about not having any gun money anymore :D )

My gun money is getting transitioned into diaper money. :rolleyes:

But a suppressor will be good for the baby's ears. :D

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Looks like you've got a good build sheet going there. All you need now is some color. (that gives me an idea for a possible group buy!)

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  • Administrator
Looks like you've got a good build sheet going there. All you need now is some color. (that gives me an idea for a possible group buy!)

All of the furniture is going to be dark flat earth. What have you got in mind?

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All of the furniture is going to be dark flat earth. What have you got in mind?

Something with a little *pop*.

Let me get some pictures taken.

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Guest Halfpint
Every day you delay buying or building your own, is a day that Obama touches himself and thinks about you.

Seriously.

:taser: Okay, this alone was enough to convince me I need to do it soon! Very nice setup you have in mind, man. Edited by Halfpint
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  • Administrator
A quick snap of my *ahem* M4 taken from high atop the Evil Empire this morning.

327263863_FdPiV-M.jpg

Real world color.

Interesting. My brother (Gerbil Kint) is planning on Duracoating his. I'm probably going to stay plain jane black and tan on this one. At least for a little while. Until I get bored. :taser:

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Guest Verbal Kint
Interesting. My brother (Gerbil Kint) is planning on Duracoating his. I'm probably going to stay plain jane black and tan on this one. At least for a little while. Until I get bored. :lol:

Hey... just because I'm paying a small fortune for mine, doesn't mean I'm not going to treat it like a $2 whore. :D

Mine will (originally) be black with FDE rails/furniture/BUIS... but I'm going to rattle-can the damn thing, if for no other reason to give the M4Carbine guys a heart attack with their "No one has the marbles to paint a VLTOR MUR yet...".

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I haven't locked down what I'll do with my SBR, when my lower arrives, but I'm leaning towards a CMMG 7.3 Pistol upper with carbine-length 4-rail, either a suppressor or a Noveske brake, and probably an EoTech, or one of the new, larger Trijicon Reflex sights. It'll definetly need a tungsten buffer and possibly a pig-tail gas tube.

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  • Administrator

I'm just going slow. I had a lot of these parts set aside already so the progress may look more impressive than it really is. The parts I lack now (upper, optic, suppressor, etc.) are the more expensive ones so the remainder of my build will probably take quite a bit longer to finalize. :lol:

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Guest db99wj
I'm just going slow. I had a lot of these parts set aside already so the progress may look more impressive than it really is. The parts I lack now (upper, optic, suppressor, etc.) are the more expensive ones so the remainder of my build will probably take quite a bit longer to finalize. :(

Do it before the baby comes. Not sure if you know, but babies need their diapers changed all the damn time, you can't do it just once or twice a day.:lol: It's amazing how much they produce.:D

The "pounds" on a diaper box is not describing how much they will hold......

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