MK 12 Mod 0 or Mod 1 clone build

[Meta-Prometheus]

Edit - Woops, Necro post. Sorry...

Just started my MK 12 mod 0 build

Bought a Colt Match Target Flat top for build.

Just ordered my Douglas MK 12 barrel 1:7 from Werner with matching bolt

Now I am looking for the

PRI gen 3 round free float black handguard
OPS Inc. Brake & Collar
PRI stand up sight gas block

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PRI Gen 3 - http://www.precisionreflex.com/Detai...86753&CAT=4812
OPS Inc. Brake & Collar - Now made by Allen Engineering but you can find it on PRI site - http://www.precisionreflex.com/Detai...86716&CAT=4274
PRI flip-up sight gas block - Cross-bolt only - http://www.precisionreflex.com/Detai...86686&CAT=4292 - W/ Set Screws - http://www.precisionreflex.com/Detai...86688&CAT=4292

Definitely prefer the appearance of the Mod 0! Unfortunately I don't see this sweet gun in my future anytime soon.

[Alaska3006]

My MK 12 Mod 0 has been done for several years now........got to say after 26 years in military this is the most accurate AR I have ever shot..........

I did make some minor changes

I installed a Reliable Bolt from Sharps
Installed a One piece McFarland Gas Ring
5 Coil extractor spring with black insert buffer
POF Roller Cam Pin Kit
M16 Carrier WMD NB finish
Titanium Firing Pin

I had a LMT Sopmod Stock with a H6 buffer this set up worked great
But I went to the Vltor EMOD A5 stock kit with the Tubbs Flat Wire Buffer Spring........and this is what I stayed with.
Really like this A5 extension and flat wire buffer spring.

[lawusmc0844]

I have a MK12 Mod 0 "clone" myself, all BCM, with a few differences. I dont use an ARMS sleeve because it will add weight, looks stupid IMO, and whats the point when my Bobro QD mount will fit on the receiver and position the scope exactly where I want it. I also went with the A5 system on all my rifles including this one. Since this rifle doesn't get shot as much as my other ones, getting an OPS Inc/Allen Manufacturing brake & collar has been a very low priority.

I still love this rifle and how it looks despite not shooting it much, however the PRI components are going to go eventually. The handguard is heavy, requires removal to mount additional rails or QD mounts, and I have to remove the gas block/front sight before I can even remove the handguard. The handguard itself is very difficult to remove without the cheap, flimsy wrench that I had to buy seperately. I did all that when I first painted the rifle and I was amazed that I even got the front sight realigned during reassembly without any leveling tools. I don't plan to constantly replace the rail but IMO a gas block using set screws instead of taper pins is not a good design. Of course, I haven't ran this rifle hard enough to knock the gas block/front sight out of alignment but its always been a concern. Most importantly I shouldn't have to remove the GB/FS everytime before I can access the handguard. With all that in mind, I am looking to get the Geissele SMR MK8 and either a matching KAC front sight to go with the KAC rear or save the money and get a Magpul MBUS Pro front.

[KingCobra]

Be aware that this rail (AFAIK) requires the use of a special wrench and other tools for a proper install. Make sure you are well versed on it before you do anything.

Uses a normal armorer's wrench and a strap wrench.

[Iraqgunz]

Kind of a non-issue since this thread is quite old.

Uses a normal armorer's wrench and a strap wrench.

[KingCobra]

Kind of a non-issue since this thread is quite old.

This thread is still linked from Google, which is why I posted that.

[general_purpose]

Subscribed! I don't think it matters the post is from 2006. As the SPR was in service then.

I think the SPR is one hot mama! It's on my list of projects.

[JG007]

I have a 28" ss Douglas blank. I've been wondering what it would take to do an "improved" mk12