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Thread: Thinking about building a SPR/MK12 rifle.

  1. #11
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    Quote Originally Posted by Alex V View Post
    I know Centurion is top notch, but what do you guys make of this as a Mod-0:

    http://www.precisionreflex.com/Conte...0Mod%200%20SPR
    Has Centruion always been top tier? (DD,BCM,LMT, Novseke)


    On another note here is the barrel I would be looking at for the build. http://www.whiteoakarmament.com/xcar...cat=250&page=2
    Last edited by Djstorm100; 08-20-13 at 13:03.

  2. #12
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    Quote Originally Posted by Djstorm100 View Post

    On another note here is the barrel I would be looking at for the build. http://www.whiteoakarmament.com/xcar...cat=250&page=2
    That is the barrel I have on mine in the above post... It works for me.
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  3. #13
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    Have you looked into the intermediate gas 18" barrels? It's in between rifle and midlength gas and from my understanding, Noveske and Rainier are the only ones doing this.The Noveske barrel is 1/7 and Rainier is 1/8 so you can take your pick on the barrel twist. I have put in a lot of time researching Rifle vs. Intermediate gas and have found that it is more reliable than rifle length, but still soft shooting and accurate.

    Remember, the barrel is the heart of the rifle and the area you should not skimp on.

    Read this thread:
    https://www.m4carbine.net/showthread.php?t=17452

    From Noveske: "Since the development of the 18" SPR barrel, there has not been a proper gas port placement to work with the desirable barrel length. Now there is a perfect combination, introducing the "Intermediate Length" gas system. Developed by Vltor Weapon Systems, and perfected by Noveske Rifleworks, the intermediate length gas system offers the ideal gas port placement, providing maximum accuracy and reliability. Overall, the intermediate length gas system (1.5" shorter then a rifle length) was developed from feedback from end users and industry professionals. Accuracy and reliability are the best characteristics of the intermediate length gas system."

  4. #14
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    Quote Originally Posted by Djstorm100 View Post
    As foolish as this sounds I honestly don't know the difference. Purpose would be to use for training and to hit targets that I can't with red dot on my 16" ar. To give a little more "reach out and touch somebody". I try not to have more than two of the same role of rifles. Each rifle has a purpose. SBR for home/truck defense, 16" for training range duty, SPR for longer ranges mostly prone, Bolt gun for even farther shooting.
    depending on what barrel & trigger you have in your 16 you might be pleasantly surprised at what you can reach out and touch just by installing a decent scope in a good qd mount and using match ammo.
    since you'll have to do that regardless which route you choose, i suggest that as a first step.
    throw in a qd mount for your red dot, you've got an easily convertible system.

    if you don't have a decent scope yet, get started here:
    Super Sniper 10x42 Tactical Riflescope P53712
    or
    Bushnell Elite 3200 Tactical Rifle Scope 10x40mm

    triggers: ALG ACT, RRA 2-s, LMT 2-s, and so on up the scale. don't know where your 16 is at now...

    that will keep you around $500 and get you well on your way once you start with match ammo.

    but if you've just got the itch for another upper (and who doesn't?), the first thing you need to decide is if you want an SPR clone or if you just want an accurate AR.
    the closer you want to be to an SPR, the more money it's going to cost by far. and a giant portion of that money has way more to do with storied history and "The Look" than pure accuracy.

    again, if you just want an accurate upper for mid-range target practice, get something like an RRA predator/varmint/national match. around $800 and RRA states .75 MOA capable.

    if you want an SPR-class battle rifle, go with centurion arms or mstn or pri, depending on your preferred variant. and be prepared to double the cost of an RRA.

    also consider larue tactical's predatAR or stealth uppers. not SPR's per se, but very accurate, high-quality AR's.

  5. #15
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    Thinking about building a SPR/MK12 rifle.

    I have a WOA barreled mod 0 clone that shoots great. I run a SWFA SS 3-9.

    Attachment 17906

    That being said, there are a lot of options and price ranges for SPR style setups. You will get great results with any of the previously mentioned barrels of you feed it good ammo.

  6. #16
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    For the most part is it cheaper to build a rifle per say or to buy one?

    With both rifles having the same components of course, so we can compare apples to apples

  7. #17
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    Quote Originally Posted by Djstorm100 View Post
    For the most part is it cheaper to build a rifle per say or to buy one?

    With both rifles having the same components of course, so we can compare apples to apples
    it's cheaper (and safer) to buy. you need tools (some proprietary to a single component), knowledge and experience - especially for an accurate rifle.

    there's only 2 advantages to building it yourself:
    1. you can get exactly the components you want (but it's easy to be too smart for your own good there (ask me how i know))
    2. you can spread the cost out over time - if you've got the patience.

    so, anyone who can change a tire can assemble an AR. but having one built right, by a craftsman, has value beyond whatever savings might appear to be gained.

    the pricing game is kinda fun. go to rainier arms, price one of their complete ultramatch uppers, then price the components (i suggest them because it's straight forward to figure out their BoM). then add in tools, etc. and see where you end up.

  8. #18
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    Quote Originally Posted by jmk View Post
    it's cheaper (and safer) to buy. you need tools (some proprietary to a single component), knowledge and experience - especially for an accurate rifle.

    there's only 2 advantages to building it yourself:
    1. you can get exactly the components you want (but it's easy to be too smart for your own good there (ask me how i know))
    2. you can spread the cost out over time - if you've got the patience.

    so, anyone who can change a tire can assemble an AR. but having one built right, by a craftsman, has value beyond whatever savings might appear to be gained.

    the pricing game is kinda fun. go to rainier arms, price one of their complete ultramatch uppers, then price the components (i suggest them because it's straight forward to figure out their BoM). then add in tools, etc. and see where you end up.
    For a battle rifle I feel like I could do it no problem. Now for a accurate ar being for a first build I don't think that would be smart idea. What about buying upper...throwing a lower on it shooting the heck out of it. Then building one and seeing how it shoots compare to the bought upper?

    Any good books/videos one can get to get more info on the "secrets" of building a SPR/ "long range" ar platform? I'm wanting one for precision classes and if I ever had to take something or someone down at a longer range.

  9. #19
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    Quote Originally Posted by Djstorm100 View Post
    Has Centurion always been top tier? (DD,BCM,LMT, Novseke)

    Yes. Monty and crew do a phenominal job and source the same parts that are used in the mil MK12. I have their mk12 upper and have never been disappointed.

  10. #20
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    I've considered building a Mark 12 SPR clone myself, but ultimately decided to put the plans on hold indefinitely. If I were to buy just the upper I'd consider going through High Caliber Sales or BCM. Sourcing an actual NF 2.5-10x24 might prove challenging though.
    "People have always been stupid. The Internet just makes it easier for us to know about them." - donlapalma

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