Well my stripped lower arrived at my lgs yesterday just need to wait on my new id to pick it up. Here is what I am planning on with it. It will be a while before I get it done as funds are pretty tight.
Spikes stripped lower spartan
Geissele g2s or ssa
Bcm mod 3 grip
BCm trigger guard
BAd-ass ambi selector
BCM qd endplate
Mil spec buffer tube
spikes st-t2 buffer
Tubb flat wire spring
might do a bad lever
B5 enhanced sopmod stock
Daniel defense a4 upper
16" 1:11 6.8 mid gas system
low profile daniel defense gas block
DD 6.8 auto bcg
DD RIS II
magpul buis pro or arms 40sp set.
flash hider will be whatever suppressor I finally decide on.
Optic will probably be a aimpoint pro or t2 eventually might have a magnifier. Might go with a 1-4 or 1-6.
Suppressor I am eventually looking at is either a surefure socom 6.8 or 7.62 or an aac 7.62sdn-6 but still looking.
The Geissele G2S has basically the same feel as the SSA for less money.
I know some people like the BAD-ASS selector but I wasn’t super impressed relative to the cost. I use conventional (left only) selectors after trying several ambi options.
I would skip the Tubb spring and ST-T2 buffer. Ideally I would go with an VLTOR A5 system, which will work 100% as delivered. If you want a carbine length system (A5 is .75" longer) then I would do a quality GI spring (like Colt) and an H buffer. 6.8 does not necessarily require or benefit from heavier buffers unless the barrel is ported too large.
All the Daniel Defense parts are good, but if you are buying separate parts I would get the barrel and bolt from AR15 Performance (Harrison Barnes), he makes very high quality stuff at very reasonable prices and probably knows as much or more about 6.8 as anyone. Website: http://www.ar15performance.com/home
If you are buying a completely assembled upper then Daniel Defense would be an excellent choice.
Handguard is personal choice, but unless you are hanging lots of accessories on it I would go with a more streamlined and lower cost option. The ALG EMR is a really nice handguard for not much money. I also like the Fortis Rev 2, which is a bit more, but still less than a RISII. I would go with an MLOK or Keymod type handguard. I personally like MLOK better, but for now this is a Ford/Chevy or VHS/Betamax type issue.
Magpul MBUS Pro are nice sights. I wouldn’t touch ARMS with a 10’ pole.
I dont care for Keymod. Guess it is because I have used rails since my 82nd days back in 1997 and my sopmod days from 2000 on to 2006. I have selected the DD upper because it is close to what I carried but in 6.8. I used the m68 on my m4 over the other optics. When I was on a team we had a lot of flexibility on our equipment and I just preferred the aimpoints. So this will be pretty close to a sopmod block 2 build with a few changes.
I will be purchasing the upper from Daniel Defense and other parts I will be getting a mil discount. I have used a g2s in the past and was a great trigger. I was just not sure if I wanted the j spring vs the c clip. The g2s would run about 140 and the ssa would be around 180.
The flat spring was just for noise. Should eliminate the spring noise. I will look into the VLTOR A5 system. The only reason whay I was lookign at the st-t2 was the powder vs the weights.
Eventually I will be using NV and a dbal-a3 for hog hunting, a vfg, and maybe a white light. This will take up a bit of space on the rails.
I would second the motion on an ARP barrel. That is good quality. The stag 6.8 is a good’n too.
I recently bought a jp spring kit for $10. Im pretty excited on how it changed a stock fcg.
I wouldnt use a different buffer though. Good luck on your build!
I used the Vltor A5 on my 16" 6.8 build and couldn’t be happier. I just keep the spring & tube lubed and it cuts down on the “sproing” effect. I’d also avoid the ARMS BUIS.
The 6.8 will do the job easily on deer and hogs to 300-350. I wouldn’t use one to go after a trophy bull but it will take a meat elk like this 5x5 at 370yds with the right bullet and shot placement. In this case a 110 Accubond and a hot handload(2800fps) out of a 20" barrel. Weird position, he slid about 30ft down to the edge of a 40-50ft drop off and landed with his body between his rack.
Check out the hog video below. Professional hog exterminator in Texas shooting a 6.8 with 120gr SSTs.
https://www.youtube.com/watch?feature=player_embedded&v=jfAWKfYsUUY
You said you’re planning on suppressing your 6.8 so I’m assuming you intend to run some subsonic ammo through it as well. If thats the case you should check out Bison Armory’s barrels. They’re designed for subsonic 6.8 rounds.
I second Bison armory. Running a 22" heavy fluted 6.8 with an ARP superbolt.
Take a hard look at the Wilson Combat 16" light barrel.
SSA
drop the Bad lever idea
1-6, look into the ADM/Vortex Strike Eagle combo
drop the BUIS
http://shopwilsoncombat.com/Match-Grade-Barrel-68-SPC-II-Tactical-Lightweight-16-1-11-Twist-Stainless/productinfo/TR-68LW16/
https://www.americandefensemanufacturing.com/view/product/1019/
The real question is has the OP built this rifle yet? It’s been 10 months…
Dang, didn’t see that one!
Some side builds of mine have taken 3-8 months ha, didn’t see the OP date though
Well its been a while and life happens as it often does. Here is an update. I am still working on this build, but have most everything but the rails, buttstock, trigger, sights, optics, and magazine.

pretty much the same thing I’m doing. I’m going to run it suppressed but I’m not going to be shooting sub’s. It will strictly be a Deer gun now that Indiana has finally gotten its head out of its ass and os of July 1, 2017 any caliber 6mm(.243) or larger with a minimum case length of 1.6 inches will be legal and a minimum of 16in barrel length. I used a 11.3in 6.8 AR Pistol(that was legal but put it on a Rifle lower and it wasn’t/still isn’t! SMH!!!) a few years ago to take 2 does at 150 yards and it dropped the DRT.
Looking at the 16in light Wilson barrel to keep weight down. 110gr Vmax is what worked before from the 11.3in so that’s what I’ll be using again.
Just have to get this bankruptcy paid for since the ex ran up my credit cards before she decided to tell me she was cheating and leaving for her new husband.
Hey OP, the Laure MBT is on sale if you haven’t picked one yet!
I am sticking with a Geissele trigger.
Thought I would update everyone on this long project. I know it is taking me forever, but life is tough for me right now and this build takes backseat. I have the lower completed. Has a g2s Trigger, B5 Sopmod stock, Seekins 60/90 selector, Seekins billet mag release, BCM QD end plate, magpul enhanced trigger guard, St t2 buffer, Flat wire buffer spring.
My upper Is mostly complete. I have a spikes upper with a Geissele charging handle, DD complete 6.8 bcg, DD 6.8 sw2 barrel, DD low profile gas block and mid length gas tube. Hopefully on the first I will get my DD NOS RIS II in black. That will leave me with a flash hider, buis, and magazines and I will be ready for the range till I can get a red dot and other items I am looking at getting.

Sounds good! Check PSA right now for ammo deals, Federal 115 Fusions 16.99 and 5 per box rebate from Federal. I lucked out on a sweet deal LMT MRP with a 6.8 BCG, couldn’t refuse it. Looking at an ARP (AR15 Performance) 12.5" barrel and bolt for a pistol build.
As long as I did not get ripped off, I have a new old stock black RIS II inbound I picked up off the other forum and hopefully it will be here today. Paid 400.00 for it and was new in box. Was given a set of DD buis as well and ordered a pair of Barrett magazines for 50% off from Barrett direct. 38.00 plus shipping for the pair. So if all goes well I would just need a muzzle device and I would be up and shooting in no time.
Sounds great, please show some pics when done.