D.R.D.

Yes, I meant receiver extension. Which is the appropriate one for use with the PRS stock? You linked one for 5.56/.223 - is it the same for .308? So, if I read you correctly, you're saying that if you use an adjustable gas block, then the AR10 spring and buffer will do. If you use a fixed gas block, then the heavy buffers may be helpful in reducing recoil. Do I have that right?

Awesome info. Thank you all for clearing so much of this up. It can certainly be confusing with all the options and misinformation out there. So, now that that build is outlined, here are my specs for the one I started. Any recommendations or suggestions are welcome! Longer range / precision 308AR (500-1000m) · SI-Defense Billet Receivers · SI Defense Phosphate BCG 20” .308 rifle-length heavy barrel (.936), threaded, 1:11.25 · MI FF SS Gen II or KeyMod 15” Handguard or Rainier Fortis Switch 14” Rail · R&D MRAD Muzzle Brake · Geissele Hi-Speed DMR Trigger · Grip – BCM Gunfighter mod 2 · Magpul PRS stock · TacOps-1 Charging Handle · SLR Sentry 9 or Syrac Gen II (.936) Adjustable low-profile Gas block · Rifle Length Gas tube · DPMS lower parts kit w/o tcg · DPMS upper parts (port cover, spring, forward assist) · DPMS Buffer tube · Slash’s Heavy Buffer & Spring · Crusader Weaponry Permanent Dry Lube Rifle slipstream treatment · Cerakote finish · Harris HBMR Bipod 6-9” swivel-notch · ADM QD bipod mount · Bobro 20 MOA QD Scope mount · 45 degree offset iron sights Optic: TBD

Thanks for the recommendations. What's the advantage of the Vltor tube over the DPMS? My M4 stock would be too short for it. Any idea if a Mission First Tactical Battle Utility or Minimalist stock is long enough for it? It seems that Slash's heavy carbine buffer is over an ounce heavier than the H3. In a 16" mid-length gas 308, wouldn't max recoil reduction be desired? And, why would you ever need to completely shut off the gas in the SLR block? DRD

Farkle, Got it. Thanks. So you mean these? http://www.bravocompanyusa.com/BCM-GUNFIGHTER-Charging-Handle-GFH-Mod-3-7-62-p/bcm%20gfh%20mod%203%20762.htm http://www.bravocompanyusa.com/H3-Carbine-Buffer-p/buffer%20carbine%20h3.htm http://www.rainierarms.com/?page=shop/detail&product_id=1727 http://www.midwayusa.com/product/348370/vltor-a5-recoil-system-carbine-receiver-extension-buffer-tube-7-position-mil-spec-diameter-ar-15-aluminum-black How is that gas block any better than a Syrac Gen Ii or Wilson Combat? (they are a little cheaper)

Lol

Here's the 16" build idea: · Tactical Machining Stripped Lower · DPMS Assembled Upper Receiver · 16” BHW Mid-Length Barrel with Polygonal Rifling 1:11 · MI SS Gen II FF 12” Handguard · Brake: Go-gun Supercomp-XL / Griffin 7.62 Flash-comp / Lantac Dragon · BCM Mod 4 Gunfighter Charging Handle · BCG: Shadow Ops (NiB) · PXT Super Light Low-profile Adjustable Gas Block (.750) · Gas tube · Lower parts kit w/o tcg · Geissele GS2 Trigger · Grip – BCM Gunfighter mod 2 · Standard M4 or Battlelink Utility Stock · Ambi Selector Switch · Heavy Carbine Buffer & Spring · Carbine Buffer tube 45 degree offset iron sights Millett DMS-1 1-4x24 Burris P.E.P.R. QD mount

So, pin that to an 11" barrel with a pistol or carbine length gas system, right? >:D

LMFAO! Got it. ;-)

I'd thought of that. Doesn't that get a bit blasty that short? You need about 18" to burn most 308 loads, no? Anyway, I'd need to wait for the upcoming "Muzzle Device Test" to be completed so I know which brake is the "holy grail" to be pinned. Any 14.5" barrels you'd recommend? Or, will I need one cut down? Also, would a shorter barrel benefit more with a tighter twist? (1:10)

I understand and have seen how various brand / quality magazines will affect consistent feeding and reliability. But, I've read many people stating that they see changes in accuracy with different mags. How is this possible? What would account for that, technically speaking? DRD

Thanks. Breathing.... LOL I'm interested in two different builds. One, I've started. It's more modeled after the OBR. 20" heavier barrel, precision, long range, PRS stock. Will have glass, bipod, etc. I am using Si Defense Receivers for this build The other (that I haven't started yet) will be 16-18", standard profile, lighter weight, with a retractable stock (battle utility stock). I'm looking to spend quite a bit less on this build. Thinking of a Bison or BWH/Rainier barrel, DPMS upper, Tactical machining lower. DRD

edgecrusher, You wrote: "I consistently get .375-.5 inch 5 shot groups prone off a bipod at 100yds" - with which rifle? Do any of your builds get the same performance as your OBR? Is the main reason you wouldn't want to run with the OBR due to it's weight, or do you have durability concerns? How much does the OBR weight, btw - and do you know anything in comparison about the Predatobr? I'm just writing this out of my insatiable curiosity. I'm still building mine. It may not be cheaper, but I don't have to lay out all the money at once. DRD

As I'm in the process of collecting parts for a custom 308 build, I tally up the price, and consistently wind up between $2200-2900 or so at the end of the day (net including optics). This is with all the bells whistles I'm looking for on this particular build. Of course, my main focus here is accuracy, and using the highest quality parts I can, while still aiming to keep the price as low as possible. So, I see prices for a DPMS 308 platform around $1500. Doesn't look like anything special. No bells, no whistles. Yet, I know many of you shoot them (with minor mods) and get great accuracy and reliability. Am I wasting my money? Is DPMS a gamble, sometimes you buy a shooter, sometimes not? Just trying to separate the wheat from the chaff (or, the Larue OBRs from the DPMSs, as it were). DRD

I wonder if there is a difference in the barrel QC you'd get straight from BHW vs. Rainier Select? Any experience with the Bison? How about the differences in twist and rifling in terms of accuracy with 168 or 175s?

I know a few of you own the following barrels. I was wondering if there has been any side by side (or at least relatively so) with the following: 18” Bison Mid-Length Barrel with 6-groove rifling 1:10 $225 18” Black Hole Weaponry Mid-Length Barrel with 3-groove Polygonal Rifling 1:11 $245 I believe both are made from 416 stainless and .750 at the gas port Thanks, DRD

It's this gonna take place at Sac valley shooting center?

I've been eternally curious about this one: http://rdprecision.net/mrad-muzzle-brake/ Anyone ever used this one before? Or this one: http://store.gogunusa.com/SuperComp-XL-Brake-762-X-51-308-5-8X24TPI-Parkzd-Steel-SCXL-308-762x51-ST-PZ-109.htm

Sweet! Any timeline for when you will be able to test them? Also, where will the testing be done?

I know, right?! Either way, they've been turning out some pretty good low-budget kit (as well as fighting the good fight). What do you think of this offering?

Just to add to the list of brakes I'd love to see tested / compared: FSC30 Griffin 7.62 Flash Comp Lantac Dragon GoGun Supercomp-XL

Anyone see this? http://aresarmor.com/store/Item/Upper_Ajax_18_308?utm_source=14June2014+-+NEW+308+Upper&utm_campaign=14JUN14+AJAX&utm_medium=email

Not sure. I was wondering the same thing. They have not responded to email yet.

Titanium is the next cool aid apparently. These looks sweet a super lightweight: http://amalgamatedti.com/arms.html http://www.v7weaponsystems.com/collections/frontpage

Yes, the Rainier Select are made for them by Black Hole Weaponry, but not the Rainier Match that mineralman55 listed above.

I take it (given this forum) you are talking about a rifle in .308. So, how does the recoil with the Kaw Valley compare to: -No brake at all -JP Brake -other brakes you've tried