MK 12 Mod 0 or Mod 1 clone build

[wolver98]

I am thinking of building a Mk 12 clone, either mod 0 or 1. Any info or advice?

[VA_Dinger]

If your hearts truly set on a 18" barreled SPR I would stick to the Mod1. While I personally love the looks of the classic Mod0's PRI forearm and ARMS top adapter rail it is now a dinosaur. It has way too many individual parts, un-needed weight, and screws that can loosen up on you. You would be much better off in the long run building a Mod1. It is a much cleaner, lighter, and simpler design. Just substitute the expensive and hard to find KAC parts for Daniel Defense, Tango Down, Troy, and LaRue parts. The Noveske 18" SPR Barrel would also be perfect for this project.

[CapnCrunch]

Agreed with Dinger on that.

For a handguard and upper, the VLTOR VIS-3 looks like it will be hard to beat

[Nitrox]

Say whay ever you want about the Mod 0 but it has a more flexible method of mounting optics.

[Steve_Morrison]

Ok, I'll be the contrarian here.
I have a Mod O and really like it. The VIS would be more ideal than anything else available and is what I would use next time.

That said, I prefer the Mod O version to the Mod 1.

The PRI carbon forends are very high quality, light, rigid and offer flexibile configuration of the rails. Though it is debatable whether neccesary, the extension rail which locks onto the forend is more rigid and offers a continuous, uninteruppted top rail mounting surface. Properly installed the screws are not coming loose.

"Screw-phobia" should not be an issue.
SPRs and AR15s have quite a few threaded assemblies- pistol grip, buffer tube, rear sight, magazine catch, flash hider, rings, light mounts, bipod mount, etc...

Another benefit to the top rail is that standard height rings can be used, which leaves less of a pedestal effect between the scope and rail.

Not that it matters, but I find the Mod O appearance to be unique and attractive.

Mod O or 1, both are great rifles, it makes me happy to know that in this case our guys are issued a the finest available equipment.

[Turbo Supra]

If you are interested, I am selling the upper from the gun below...

Here's the specs:

This is a custom upper built similar to the SPR Mod 0 spec.
Round count = 50 Black Hills 75gr .223 match-grade ammo. Held less than 1 inch at 100yds. Proper break-in followed. Functions flawlessly.
ATN 5X33L Scope has range finding reticle and bullet drop compensator for .223/5.56mm.

White Oak Armory A4 Upper
White Oak Armory Stainless Steel Barrel 18" 1:7 SPR contour (Turned from Wilson Match Grade blanks)
White Oak bolt carrier group with bolt
Black KG Kote on barrel (Done by ADCO)
YHM Phantom 5C2 flash hider
YHM Front Flip Sight / Gas Block Assembly with bayonet lug
PRI Gen 3 carbon fiber rifle-length free-float tube
ARMS #38SPR PEQ2-3 17 5/16" long rail
ARMS #40L Flip-Up rear back-up sight
ARMS #22 30mm quick-release ring mounts, medium height
ARMS #32 quick-release bipod mount
Harris 9-13 bipod
ATN 5X33L scope with .223 bullet-drop compensator

Complete upper group as described = $1600
Complete upper minus scope, rings, bipod and bipod mount = $1250

[K.L. Davis]

The change from Mod0 to Mod1 was made for good reason.

EOM

[-Veritas-]

My two pennies...

I recently struggled with the same dilemna. I would say that VA Dinger makes very good and valid points.

The best point I would make is that you can save money and get "better" parts with a MOD 1 type. Here's what I went with.



18" Compass Lake Doulglas SPR 1:8 black kg bbl
COLT m4 Match lower
COLT m4 upper
LaRue 13.2"
LaRue gasblock
LaRue SPR mount
Leupold 3-9x36 Illuminated Mildot scope
OPs Inc 12th Model brake and collar
Ergo grip
Sopmod stock
TangoDown single point mount
Harris bipod

Ultimately get what you'll be happy with

[bigbore]

The change from Mod0 to Mod1 was made for good reason.

EOM

[cohiba]

If your hearts truly set on a 18" barreled SPR I would stick to the Mod1. While I personally love the looks of the classic Mod0's PRI forearm and ARMS top adapter rail it is now a dinosaur. It has way too many individual parts, un-needed weight, and screws that can loosen up on you. You would be much better off in the long run building a Mod1. It is a much cleaner, lighter, and simpler design. Just substitute the expensive and hard to find KAC parts for Daniel Defense, Tango Down, Troy, and LaRue parts. The Noveske 18" SPR Barrel would also be perfect for this project.

Hey!!!! I thought we were buds. I resemble that remark.









KAC lower
Magpul PRS, MIAD
Colt upper
Colt BCG and MP bolt
ARMS rail
PRI CF tube, front sight gas block
NF 2.5-10 in LT SPR mount w/ LT J-Point mount and J-Point
Noveske SS 18" SPR barrel, SS, poly, 5.56 Match chamber
OPS Inc 4 port brake
Raptor bipod
SF M962 in LT mount