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Photos Mk12 Mod 1 SPR US Optics SN-3 T-PAL 1.8-10x C2 ret

C

Cesiumsponge

Sergeant
Full Member
Minuteman
Nov 4, 2009
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Seattle, WA
My attempt at a Mk12 Mod 1 Special Purpose Receiver/Rifle build. Parts list:
<ul style="list-style-type: disc">[*]Colt M4 A3 T-marked upper[*]Lewis Machine Tool full-auto bolt carrier group[*]Knights Armament Company SR-15/16 free floating rail system P/N 99167[*]Knights Armament Company M4 Flip-Up Front Sight P/N: 99051[*]Knights Armament Company Flip-Up Rear Sight 200-600 Meter P/N: 98474[*]Noveske SPR barrel, rifle gas system, 3-groove 1:8 RH stainless, boron carbide coating[*]OPS Inc 12th Mod brake and index collar[*]OPS Inc 12th Model suppressor[*]TAB Gear Suppressor Anti-Mirage Shield[*]Badger Ordnance crane gas block, set screw[*]Colt LE lower receiver from 6920[*]Colt lower parts kit[*]Geissele 2-stage hi-speed national match designated marksman trigger[*]Knights Armament Company P/N: 20491 Combat Trigger Guard[*]LMT SOPMOD stock[*]LaRue LT-101 cantilever riser[*]Larue LT-30 Harris bipod QD mount[*]Harris bipod w/ KMW podlock[*]Seekins Precision .870" rings[*]SPR grip[*]Magpul AFG[*]Vickers padded combat applications 2 point sling[*]US Optics SN-3 1.8-10x37mm T-PAL with C2 reticle on FFP, MIL/MIL EREK knob and M40 windage turret. Digital rheostat[/list]

Larger versions:
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Reticle @ 1.8x
https://farm6.staticflickr.com/5027/5691595939_aa6664577d_o.jpg
Reticle @ 6.0x
https://farm6.staticflickr.com/5068/5691573565_bb765b1a82_o.jpg
Reticle @ 10.0x
https://farm6.staticflickr.com/5182/5691571949_aa72553016_o.jpg
 
Re: Mk12 Mod 1 SPR US Optics SN-3 T-PAL 1.8-10x C2 ret

That looks great! How does it shoot? I am trying to decide if I want to build my own with a Noveske barrel or just order a complete upper from HCS. I have a Noveske lower with a fixed stock, Geissele trigger all ready to go. Ordered a NF 5-22 yesterday. I'll have it here in the next couple weeks for a big shooting party i'm going to.
 
Re: Mk12 Mod 1 SPR US Optics SN-3 T-PAL 1.8-10x C2 ret

Shoots better than I do. I can keep it around an inch most of the time with Black Hills 77gr, 5.56mm pressure loads (Mk262?) and I'll be the first to call myself a very mediocre shooter. The reticle is a jack-of-all-trades so it's a bit thick for trying to shoot pea groups. It might tighten up with something like a P4F on a S&B or something finer. I don't think I've heard of a bad Noveske barrel.

The barrel was a specific run by Noveske for Wes Grant of MSTN which differs from Noveske's typical polygonal rifling. I'm not sure if Noveske sells this barrel directly to a customer or if it's still in production. They do offer a "SPR barrel" but it uses an intermediate gas system and polygonal rifling so it isn't the same thing. I'd be curious how the Noveske offering stacks up against the contract Mk12 Compass Lake Engineering, Douglas barrels. I was going to have Monty at Centurion build me a Mk12 upper with the contract barrel but he was backlogged 6+ months so i went with Wes since I didn't want to wait (I ended up waiting a year for the USO though, doh!). I don't remember if HCS was offering Mk12 uppers at the time. This was probably about three years ago.

I'd just order from HCS or Centurion to get a 100% parts-correct SPR upper since it's simple. I think those are the only two guys making true Mk12 uppers since they have access to contract barrels and everyone else makes "something close". You can't go wrong with Noveske though but I'm not sure if they still sell or make the barrel I purchased.
 
Re: Mk12 Mod 1 SPR US Optics SN-3 T-PAL 1.8-10x C2 ret

I have seen a lot of good looking black rifles in my time but that one to me takes the cake. What did the total build cost set you back if you don't mind me asking?
 
Re: Mk12 Mod 1 SPR US Optics SN-3 T-PAL 1.8-10x C2 ret

They are fun for sure, I have one. One bit of advice... take that TAB cover off the can when you shoot....
 
Re: Mk12 Mod 1 SPR US Optics SN-3 T-PAL 1.8-10x C2 ret

Very nice...
 
Re: Mk12 Mod 1 SPR US Optics SN-3 T-PAL 1.8-10x C2 ret

Why take the cover off when shooting? Having never owned a suppressor or shot more than a few rounds through one, I am low on info here. Is this specific for the type of can the OP is running? Too much heat build up - lead to damage?
 
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