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aplinker
07-17-2007, 5:21 AM
My next build I want to do an SPR. The problem is... well... Too many things to decide.

I can't even decide caliber yet. I'm leaning towards Grendel, but I might just do 223 or 6.8.

So far, here's what I have in mind... (no particular order)

1.) Complete LMT MRP Rifle with 18" stainless in 6.8, Defender lower, SOPMOD stock, etc... etc...
http://www.lewismachine.net/product.php?p=56&cid=8&session=34411b4a3ac4915dcb425f3cb1e4dd23
http://www.lewismachine.net/images/product/L7RA1A.jpg

2.) Billett build -- POF Gen-III with VLTOR Billett VIS (either mid or rifle length). This one has the most ??'s... barrel manuf? Stock - Magpul UBR or SOPMOD or ?? Maybe Alexander Arms barrel? Other? "Why not get a full POF rifle?" you ask... Well, my M4gery is a gas piston. I think I'd prefer a standard design for the SPR.
http://www.vltor.com/images/VIS3rightview.jpg
http://www.pof-usa.com/lower_receiver/DSC0306758.JPG
http://www.magpul.com/catalog/images/ubr2.jpg

CONTINUED BELOW

aplinker
07-17-2007, 5:22 AM
PART II


3.) Complete Sabre Defence SPR Rifle with 18" vanadium alloy Grendel barrel.
http://i187.photobucket.com/albums/x82/uclaplinker/saberspr.jpg


I'm pretty sure about wanting a brake instead of a FH for more flexibility (can switch out with MM/A2).

I'm thinking US Optics 1.8-10X SN3 in a Larue mount (I'm a huge fan of Larue)
http://www.usoptics.com/product.php?partnumber=SN3-1000
http://i187.photobucket.com/albums/x82/uclaplinker/usoptics.jpg

So here are the big questions.

*Which build? Am I blatantly missing another option?

*Grendel vs 6.8? Ammo availability doesn't seem to be a big issue either way and it's priced in the same ballpark, maybe less, compared to 308.

*I'm leaning toward 18", but I could be convinced otherwise. Are there big reasons to move toward longer or shorter for these calibers? If I do build 2, whose barrel?

*What muzzle brake? Gill brake seems interesting (Sabre), others?

Appreciate the opinions, comments in advance. I'll keep this updated as I move into building and/or purchasing.

Crazed_SS
07-17-2007, 5:41 AM
Man, that looks extremely expensive. :eek::eek:

Prc329
07-17-2007, 7:32 AM
If you are planning on spending that kind of money do a true spr and use one of there uppers.

http://www.adcofirearms.com/acc/ProductLine_.cfm?product_category=Complete%20Upper s&subcategory=Rifle%20Uppers

Both mod 0 and 1 are in stock. Also take a look at IOR for glass. I am extremely pleased with mine.

tiger222
07-17-2007, 8:29 AM
Agreed with PRC on the ADCO - get something with a military pedrigree or atleast a resemblence, would be cooler - imho. On a lower, LMT or Sabre, KAC two stage trigger, i like your stock choice though a LMT SOPMOD in FDE with a matching Magpul p-grip and some FDE rails could be fun..... On the glass a Leupold MRT ~ might a well go as "seal" as possible :gunsmilie:

ocabj
07-17-2007, 8:48 AM
I'd take the MRP over a mod0 or mod1. The MRP is a far better platform simply because of easy barrel swap capabilities.

Prc329
07-17-2007, 9:09 AM
I'd take the MRP over a mod0 or mod1. The MRP is a far better platform simply because of easy barrel swap capabilities.

Does it use standard barrels?

ar15barrels
07-17-2007, 9:11 AM
Does it use standard barrels?

The MRP uses proprietary barrels.

mltrading
07-17-2007, 10:05 AM
Go Vltor VIS!!! It will work with all standard BBLs. Furthermore, the VIS barrel nut is kind of low-profile. You don't bother indexing the barrel nut to align to the gas port on upper receiver. Just torque to 40ft-lb.

aplinker
07-17-2007, 1:03 PM
The MRP uses proprietary barrels.

Man, Randall... I was hoping you'd chime in with more input here.

I'm starting to lean away from the Sabre, even if it is Grendel. After further review there seems to be talk of lower quality?

You might be right about the IOR, but does anyone else make a scope with that wide of a range of magnification? Leupys are either 1/2 that on the top or bottom. IORs looked the same. I wish there were something like a 1-10X.

I'd take the MRP over a mod0 or mod1. The MRP is a far better platform simply because of easy barrel swap capabilities.

That's what I'd heard and thought, too. They currently only do 6.8 and 223 for calibers. If only I knew someone around my area who knew how to make custom barrels.........:D

Go Vltor VIS!!! It will work with all standard BBLs. Furthermore, the VIS barrel nut is kind of low-profile. You don't bother indexing the barrel nut to align to the gas port on upper receiver. Just torque to 40ft-lb.

Interesting... That would make barrel changes a little quicker, but not like the MRP. The VIS sure looks nice, but so does the MRP...

Agreed with PRC on the ADCO - get something with a military pedrigree or atleast a resemblence, would be cooler - imho.

I'll have to look at them more in-depth. I looked them over a bit when I started and dismissed early for some reason I can't recall now.

On a lower, LMT or Sabre, KAC two stage trigger, i like your stock choice though a LMT SOPMOD in FDE with a matching Magpul p-grip and some FDE rails could be fun..... On the glass a Leupold MRT ~ might a well go as "seal" as possible :gunsmilie:

KAC 2-stage over Jewell or Timney? I realize the 2-stage is probably more mil-esque, but would it be smooth?

The LMT SOPMOD is nice. Magpul MIAD... You have good taste in rifles, so I appreciate your input.


MORE SUGGESTIONS, PLEASE!! :D

phish
07-17-2007, 1:27 PM
Keep in mind, you have to use LMT's barrels if you want to change calibers. They don't sell their barrel extensions to outside vendors.

If you do the math, VLTOR and LMT come up about the same in the end with the VIS having a slight edge of allowing you to use any typical barrel out there.

Prc329
07-17-2007, 1:30 PM
I run a 2 stage RRA NM Trigger in all my guns (need to but 2 more) and they are very smooth and usable. I really like them. As far as Adco, Steve and MSTN are the best know makers of authentic SPR uppers. If you want a almost exact copy of a military SPR rifle you have to go to them unless you build your own. They use many correct parts as possible.

If you are going to the shoot on saturday come see me (Nate) and I will let you take a peek threw my IOR. It is a beautiful piece and should be on anyone's list looking at a nightforce or USO. Not saying it is better but should definitely be considered.

Jicko
07-17-2007, 1:42 PM
Really depends on functionality vs authenticity that you are going after...

Some of us(Pablo, SI-guru) want to make it as close to the real thing as possible, while some others(biwese, prc329) just want a SPR-ish, and go for functionality(chrome-lined barrel for ease of cleaning, non-ops-inc brake for the huge $$-break)....

Here is SI-guru's:
http://www.hunt101.com/img/321858-big.JPG

Here is mine (still need to get the KAC front and 600m rear BUIS):
http://images24.fotki.com/v854/photos/2/26966/4762546/IMG_1714-vi.jpg


As far as 2-stage goes.... KAC 2-stage is really nice, authentic, but I dunno if it is *better* than gieselle.... personally, if I am spending that money, I would go with a KAC.... but many will tell you that gieselle is actually better...

Prc329
07-18-2007, 11:26 AM
I'm thinking of parting out my current SPR upper and making a version of a mod 0 since I can not afford a real mod 0 right now. I love the look but currently would need to do a complete rework and sell off my middy barrel and handguard.

Hmm.

ar15barrels
07-18-2007, 2:18 PM
Man, Randall... I was hoping you'd chime in with more input here.

I'll have to look at them more in-depth. I looked them over a bit when I started and dismissed early for some reason I can't recall now.

KAC 2-stage over Jewell or Timney? I realize the 2-stage is probably more mil-esque, but would it be smooth?

The LMT SOPMOD is nice. Magpul MIAD... You have good taste in rifles, so I appreciate your input.

MORE SUGGESTIONS, PLEASE!! :D


I'll have an MRP here in a couple days if you wanna come drool on it.
I also have lowers here with Timney and Jewel triggers in them.
Miads, Sopmods & CTR's OH MY...

aplinker
07-19-2007, 12:26 AM
I'll have an MRP here in a couple days if you wanna come drool on it.
I also have lowers here with Timney and Jewel triggers in them.
Miads, Sopmods & CTR's OH MY...

Now I'm worried... I know I want an MRP, but I need to read up more on the others.

Building a "mil-spec" SPR sounds like fun, too.

Which MRP are you getting? Rifle or Carbine?

ar15barrels
07-19-2007, 12:35 AM
Which MRP are you getting? Rifle or Carbine?

Carbine length, which is actually mid-length.

The CQB MRP's are basically the same as a mid-length handguard and receiver put together.
The carbine-gassed barrels (10.5" and 14.5") have a low profile gas block that hides under the rails.
Mid-length barrels (16" and 18") will have an exposed gas block on the CQB MRP.

Rifle length MRP's hide the gas block on all barrel lengths.