SPR Build Questions

M

Mk636

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Full Member
Minuteman
Dec 7, 2009
11
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Savannah, GA
#1
Hey, everyone. I've long been pondering a precision rifle that I could also use for closer range shooting as well. At first I wanted a .308 AR, but they seem very expensive and heavy. The ammo is also pricy, and I already own a .308 Remington 700 LTR.

For uppers, I was considering either the 18" Spike's Tactical SPR or 18" Larue Stealth. I've heard many good things about the Stealth, except for the lack of M4 feedramps. Would this be a problem (especially for rapid shots)? And does anyone here have any experience with the Spike's Tactical SPR? Both of them come with the LW-50 barrel, Wylde Chamber , 1 in 8 twist and polygonal rifling. I am leaning more towards the Spike's Tactical because it is a little cheaper and the top rail is continuous, but I'd rather not make an uninformed decision. Also, the Spike's Tactical site says the SPR is for 5.56 on its listing, but Wylde chambered for .223 on the SPR info page. Is that true or a typo?

I also read in another discussion the suggestion about an 18" barrel with a rifle-length gas system. Who can I get those from?

Thanks for any suggestions or input!
 
#2
Re: SPR Build Questions

M4 feed ramps are not really needed, unless you go full auto. I have ARs configured in both ways, and never really had a problem with either. My Mod1 SPR has a rifle feed ramps.

As for uppers, go with the LaRue. I know it's childish and spiteful but Spikes Tactical was one of the first if not the first companies to artificially jack up the AR15 prices right after the election. Literally overnight, right after the election, they doubled the price of just about everything.
 
#3
Re: SPR Build Questions

It's not as sexy as a MK12 Mod1 build, but the AMU SDMR config is a good way to get a real shooter on the cheap.
http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=1746734#Post1746734
sdmr4441halfsizetrue.jpg

Throw an ACOG on there and you would be in business.

Here is a good article that outlines what it is all about.
http://www.scribd.com/doc/23922065/Infan...YOU-spring-2005

The first thing you need to decide on though is what is the primary role of this weapon.
- Accuracy?
- Portability?
- Versatility?
- or do you just want something that looks cool and goes bang?

Just remember that there is a purpose for all of the hundreds of modified AR parts.
It is paramount that you assemble the right combination to achieve optimum performance.

Good Luck and have fun with your build.
 
#4
Re: SPR Build Questions

Here is a SPR/DMR Type AR I have built with a WOA 18" bbl, Larue 13.2" Handgaurd, Trijicon Acog TA01 NSN, Larue Acog Mount, Geisselle Trigger, Advanced Armament Vertical grip, Harris Bipod, Larue Bipod Mount, Troy BUIS etc.

0410101225-017777.jpg


77.jpg


0410101228-02.jpg




<span style="font-weight: bold">10-shot </span>group @ 100yrds (5 of the shots went in same hole) Looks like I had breathing problem on the second string of the 10rds.
100yardaccuracywithanAR-15.jpg
 
#5
Re: SPR Build Questions

Dr. Phil, my aim is to build an SPR, so accuracy would come first. The portability and versatility I expect would come from it being an AR (also why I decided on 5.56 instead of 7.62). I'd like to have a Mk12 build, but that seems like a lot of money which I can't truly justify spending! I am looking forward to this build though, since it's going to be my first one. Looks aren't as important, since I think a simple rifle is more aesthetically pleasing, although I'd rather have folding back-up sights. As far as looks go, my only want is a continuous top rail, although it's not really a requirement.

Bacarrat, I didn't know that about Spike's. I've heard only good things about them from my friends and a lot of guys here on the forums, and that's about all I have to go on. I have no idea how their SPR upper performs though. It might be a little wrong, but I'd rather get the best bang for my buck... but Larue definitely has a lot going for them. Seems a lot of guys here like their Stealth uppers.
 
#6
Re: SPR Build Questions

Frank White at Compass Lake Engineering makes wicked accurate barrels on Douglas or Krieger blanks.
My .22 SPR (MK12 Mod) shoots about 3/8" @ 50yd in good conditions, when I'm having a good day.
Well known in match rifle circles.
 
#7
Re: SPR Build Questions

I have an 18" white oak upper built by ADCO. It shoots great. I wanted a gun that got good and looks cool too so went the mod 0 route. I admit it was pure vanity on my part. You can get the same performance for a lot less $$:)
 
#8
Re: SPR Build Questions

One more question, guys...

What trigger would be best to start off on? I was looking at the Armalite 2 stage triggers, Geissele or JP triggers, although I don't really know which way to go. My experience is solely with my M4A1 trigger, and I can tell that that's no good for an SPR. The Geissele looks good, but is really pricy and I'm not sure if my skill level can use it to it's full potential. The Armalite tactical 2-stage triggers seem decent enough though.
 
#9
Re: SPR Build Questions

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Mk636</div><div class="ubbcode-body">One more question, guys...

What trigger would be best to start off on? I was looking at the Armalite 2 stage triggers, Geissele or JP triggers, although I don't really know which way to go. My experience is solely with my M4A1 trigger, and I can tell that that's no good for an SPR. The Geissele looks good, but is really pricy and I'm not sure if my skill level can use it to it's full potential. The Armalite tactical 2-stage triggers seem decent enough though. </div></div>


Try the Rock River 2-stage trigger its a good all around 2-stage trigger and for around $120 its cheaper than most and works well.
I have 2 of them on builds.
 
#11
Re: SPR Build Questions

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Mk636</div><div class="ubbcode-body">The Geissele looks good, but is really pricy and I'm not sure if my skill level can use it to it's full potential.</div></div>

Look again, the Geissele SSA is $170 at Bravo Company, and it blows all others out of the water. I've played with a RRA and a JP, neither can touch the Geissele, it's perfect, especially for an SPR where you don't want any trigger adjustments to come loose, or to have a trigger that's only surface hardened start doubling on you after a few rounds.

-matt

ETA: Don't ever skimp on something on the basis that "I can't use it to its full potential", because that's true of every component that every shooter uses, no matter their ability. The fact is that nobody is perfect, but it's also true that the functional accuracy of a rifle is a sum of the rifle's accuracy and the shooter's accuracy, it's not an average or any other mathematical combination of the two. So, no matter what, a more accurate rifle will allow you to shoot more accurately than you can with a less accurate one.
 
#13
Re: SPR Build Questions

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: monteboy84</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Mk636</div><div class="ubbcode-body">The Geissele looks good, but is really pricy and I'm not sure if my skill level can use it to it's full potential.</div></div>

Look again, the Geissele SSA is $170 at Bravo Company, and it blows all others out of the water. I've played with a RRA and a JP, neither can touch the Geissele, it's perfect, especially for an SPR where you don't want any trigger adjustments to come loose, or to have a trigger that's only surface hardened start doubling on you after a few rounds.

-matt

ETA: Don't ever skimp on something on the basis that "I can't use it to its full potential", because that's true of every component that every shooter uses, no matter their ability. The fact is that nobody is perfect, but it's also true that the functional accuracy of a rifle is a sum of the rifle's accuracy and the shooter's accuracy, it's not an average or any other mathematical combination of the two. So, no matter what, a more accurate rifle will allow you to shoot more accurately than you can with a less accurate one. </div></div>

I concur. Buy the Geisselle. you wont regret it.
 
#14
#15
Re: SPR Build Questions

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: 051F</div><div class="ubbcode-body">

all i know is what ive got, and its a BCM stainless mid length 16". its sub MOA. </div></div>


I have just built a Mid-length AR with a 1-7 Twist 16" Bravo Co. Barrel but have yet to get to the range. Im glad to hear yours shoots that well. what kind of bullets does it like? I would think the 69gr. and 77gr. SMK's.

<span style="font-weight: bold">Here is a pic of it:</span> (still waitig on my Aimpoint for it)

0410101235-01.jpg


Finally got this thing to the range and it could shoot.
<span style="text-decoration: underline">Dont pay attention to the .37" part, I wote the wrong size on the wrong target. It should be</span>:

<span style="font-weight: bold">.6" group @ 100yrds. 10-shot group</span>
37in10shotgroupat50yrdswith68grBlac.jpg
 
#16
Re: SPR Build Questions

Thanks for all the info and suggestions, guys! I just put my Stealth upper on order, and have decided on the Geissele SSA Combat Trigger. After that, going with the Magpul ACS, MOE grip, and backup sights and a Larue Stealth lower (as soon as I get back from this deployment). My roommate is also selling me his Eotech and I will be looking around for scopes as well.
 
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