Looking for a long bull barrel upper that will give me SubMOA in 556

What's out there?

Barrel type?
Barrel lining?
recommended twist? 1/8?

Guaranteed?  LaRue.

Twist rate depends on what weight bullets you plan on shooting. 1/8 would be about perfect for 90% of all shooters going for tight groups at longer distances though.

I figured 1/8 or 1/7 for 55g or heavier bullets.
Bull barrel 18 to 20 inches
what lining?
what make?

Do you handload?   That might be a big factor.   Yes, I have seen a few people have sub moa with factory ammo, but that's much rarer and harder to do then if you handload.  From what I can tell.  I think it's possible.  I've done it once or twice.  But for me, my expectation for most factory ammo is 1-1.5 for good match stuff and a good day.   I have gotten sub MOA like twice.  But if I wasn't there, I wouldn't have believed it with what ammo it was.

This was the Winchester White box 55 grain fmj that was made by Israel.  It would come in 40 round value packs at walmart and it was crazy accurate.  I know, you don't have to believe me.  I'm just stating what I know.   I have not gotten sub MOA with any other load from black hills or federal GMMM or whatever.    Anyways... you see my point.  You probably already know it, but I'm just making it in case you forgot.  Ammo is a big factor.  

For a gun, what shot that  sub MOA group (and other good groups from time to time) is an upper built buy ADCO.  WOA barrel and upper and BCG.  16" recce barrel, mid.  I kid you not though, I had a 7x VX-1 in a larue mount and a freaking crappy USGI 7 pound trigger.    Prone, bipod, sandbags in the rear and a fixed A2 stock.  (I swear a fixed stock helps me shoot smaller groups better)

And yes, that's 100 yards.

My CMMG Piston can get me 2 MOA (maybe less) with LC M193. I understand its the ammo too. I don't have time to reload but have in the past. My friend does often.
WOA barrel and upper and BCG...heard of them. Seems to be the standard for accurate barrels    nice groups.

Rock river will do it

NM?
Varmint?
Competition?
16 18 20 24 inch barrel?

There plenty of uppers out there that will shoot subMOA. You just have to have the right ammo and shooter.


SPR Division (AR/AK/FAL/M1A etc WITH magnified optics) at 100 yards........

1.Mike_P: Larue Stealth upper .223 Rem 18"/13.2" - Predatobr Black gold trigger + Atlas Bipod + A2 stock - 12x SWFA SS in LT104, 77gr FGMM, Groups 0.597 / 0.345 / 0.249 / 0.248 / 0.265 = avg .340 MOA
2. dpmmn  16" LaRue PredatAR barrel MBT Trigger 77gr GMM Bushnell 1-6.5x24 .482 .490 .582 .583.457 /.5188" =.4955 MOA
3.TheKnack: Homebuilt Larue 20" .223- Harris Bipod-Weaver 3x15-ADI 69 grain SMK: .512/.806/.272/.414/.602= avg. .521=.497 MOA
4. billyhill-, WOA Match upper 1-8" Wylde 223, RRA Lower, Weaver T-36, 21.5 gr Reloder 7 / 52 gr SMK / LC new brass / Rem 71/2, Groups: 0.425/0.515/0.469/0.716/0.801 = .702 /5 = 0.5404/1.047 = 0.516 MOA
5.Lennyo3034: Home build 223, Krieger 7.7 twist, March F 3-24X42, 77SMK over 8208. Groups: .568"/.526"/.661"/.503"/.581"= .568" average= .542 MOA
6.Mike_P: Larue Stealth barreled 20" 5.56 upper - Larue MBT Trigger + Atlas Bipod + PRS stock - 12x SWFA SS in LT104, 77gr FGMM, Groups 0.459 / 0.553 / 0.611 / 0.433 / 0.661 = avg .543 MOA
7. Mike_P: Larue 12" 5.56 Stealth with SilencerCo Specwar K - Bushnell 4.5-18x40 in an LT104, Norma 77gr Match (SMK), Groups 0.521 / 0.884 / 0.314 / 0.560 / 0.510 = avg .5578 MOA
8. Face454 20" Krieger Barrel home build .223, SWFA 20X scope, reloads: .592, .50, .657, .533, .716. Average MOA = .5727
9..Jaqufrost: Home build 5.56 - Larue 20" barrel, Larue BCG, Geissele High Speed Match- Bushnell XRS 4.5-30, H-59 reticle - 77gr SMK over 23.5gr Varget. Groups: .568"/.764"/.682"/.577"/.685" = avg. .655" =.585 MOA
10. sommere54 - SPR with magnified optic, 100 yds - LT 20" barrel, MBT, JP SCS, Burris E1 4.5-14x, - handloads: 69 SMK, 23.4 gr. 8208 XBR - Groups: 0.378" + 0.566" + 0.676" + 0.756" + 0.794" = 3.17" / 5 = 0.634 / 1.047 = 0.606 MOA
11.Potss: Home Built, 16in LW poly rifled medium , Hiperfire EDT, CAV-15 Stock, SWFA 10x42- 55gr Berger HSM loaded. Groups: 0.427"/0.462"/0.657"/0.7145"/.987" = avg. 0.6495"/1.047= .6203MOA
12. Rowlock: AR15, Home built Rock River 24", 5.56 NATO. Leupold Mark AR MOD 1 4-12x40mm. Federal Gold Medal .223 Remington 69 grain BTHP. Groups: 0.6175" / 0.9050" / 0.3185" / 0.6170" / 0.8873" = avg. 0.6691" = 0.639 MOA
13. CoffeedrinkerinNC Rock River AR-15, 20" 1-9 barrel, handloads, LC brass, 25.5 grs varget, 69gr Nosler CC. group 1 .425, group 2 .441, group 3 .464, group 4 .555, group 5 1.379. Total is 3.264, divided by 5 equals .6528 MOA.
14 SpeyRod, SPR, LaRue Tobr 5.56, 77OTM Berger over 22.5gr Varget and Rem 7 1/2, (.649, 1.017, 1.039, .778, 1.072)=.911-.224=.687/1.047=.656moa
15.Flg23, SPR Division at 100yds, Knights Armament LPR Mod2 5.56 with NF ATACR 4-16, 0.71+0.69+0.553+0.59+0.909=3.452/5=0.6904/1.047=0.659 MOA Average
16.wiseanhyzer: 16" mid-length, DD S2W barrel, Redfield 2-7x32, LaRue MBT, 5.56 Specwar K, 50gr .223Groups: 0.4145, 0.7965, 1.0745, 0.6345, 0.5515 = 3.4715" / 5 = 0.6943 / 1.047 = 0.6631 MOA
17.Greenheadcaller, DPMS 24 BULL .223, Vortex Crossfire 1, reloads 50g vmax H322; Groups .844"/1.02"/.478"/.821"/.406" = Ave .7138 = .682 MOA
18.akethan LaRue OBR 16" 7.62 / IOR 4-14 MP8/ 168gr GMM .673/.979/.583/.939/.285=.6918
19. lefty-weaver-g19; home built rifle CLE/Krieger 18" mid length barrel, 12X swfa optic, Timney trigger, 77 smk, h4895, rem 7 1/2, lake city virgin; Groups: 0.404 / 0.894 / 0.640 / 0.919 / 0.767 = avg 0.725 = 0.692 MOA
20. Hollywood_Shooter: LaRue Tactical .308 - Bushnell Elite Tactical 6-24x50 FFP G2DMR - 155gr HPBT SMK. 0.798"/0.792"/0.636"/0.647"/0.824" = 0.7394" AVG = 0.7062 MOA
21. SpeyRod, LaRue Stealth 18"/13.2 + LaRue Lower + Burris sig select 3-12, 77gr Berger over Varget, ..380/.877/.725/.940/.627= ..710 MOA
22. lb6r - Homebuild wyld .223 - Shillen 20" 1/8 twist, RRA NM upper, lower, trigger, harris brm, Gemtec Halo, Primary Arms 4x14 hudd, 77 gn Nosler 24gn varget. Groups 1.18"/ .626"/ .632"/ .347"/ .956" =avg. .7482" = .714 moa
23.InfiniteGrim: Home Build 18" LW50 5.56 / SWFA 5-20HD / Nosler 77gr Handloads: .701/.782/.580/.768/.744 = .715 MOA
24.FALARAK: Self built Krieger .223 20" LaRue Rail, LaRue MBT  PRS - Leupold VariX-III 6.5x20 in LaRue LT-104 - 77gr SMK handload 24.5gr Varget CCIBR - Groups 1.017 / 0.823 / 0.792 / 0.573 / 0.576 = avg .756" = .723 MOA
25. lefty-weaver-g19. Built by me. Black hole custom barrel, vltor upper, timney trigger, SWFA fixed 10X mrad scope. Hand loaded 69 grain smk H4895 .811, .640, .361, 1.044, .834, average .738
26. ean: Larue Stealth 18" Barrel, Larue MBT trigger, Vortex Viper PST 6-24x50 - Federal GMM 77 grain. Groups: .523" / .91" / .692" / .999" / .821" = avg. .789" = .753 MOA
27. Mike_P: Larue 18" 7.62 PredaTobr with SilencerCo Saker 7.62 - Vortex Razor HD 5-20x in an LT135, FG.MM 168gr, Fed AE M1A, BH 168gr Match, Groups 0.966 / 0.843 / 0.879 / 0.637 / 0.458 = avg .756 MOA
28.dangerranger61007  AR15. Larue 18" Stealth barrel, Larue trigger, Bushnell Elite Tactical 3.5-21. Shooting 77gr GMM Groups: .673, 1.034, .709, .658, .894 = .7936"CTC / 0.758 MOA
29. MORifleman, SPR Division, magnified optics Groups .953/.719/.336/1.272/.871 = .8302" average. MOA at 104 yards = .7623
30.GaJeep94YJ: Larue stealth upper 18", RRA lower with Larue MBT with the A2 stock. Nightforce 5.5-22x NP-R1. Winchester Match HPBT 69 gr., 0.829", 0.9995", 0.627", 0.813", 0.563" / 5 = 0.7663"
31. akethan 18" LaRue OBR .556 75gr Hornady .771 .462 .948 .846.814 = .768
32.Larue_Tactical tOBR 16" 556/ 77gr GMM .617 .623 .657 .969 .979= .769
33. MDMOORE99: Olympic Arms K8 5.56 - Primary Arms 4-14X44 Mil FFP Scope - Handloads. Groups .562/.876/.736/1.171/.724=avg .8138" = .777 MOA
34.Lennyo3034: Home build 223, Douglas SPR barrel with CLE chamber, Bushnell Elite SMRS 1-8.5X24, 69SMK over 8208. Groups: .989"/.612"/.673"/866"/.924"= avg. .813"= .777 MOA
35.CastorTroy: Home Built, 20" Shilen Match 6.5 Grendel, Vortex PST 6-24x50, Geissele Hispeed DMR, 123gr .264 Hornady SSTGroups: .325" + .536" + .876" + 1.174" + 1.162" = 4.073" /5 = .8146" /1.047 = .778 MOA
36.Face454 16" AR Performance Barrel home build .223 Wylde, SWFA 20X scope, 77 SMK reloads. .771, .723, .920, .1.176, .53; .824 avg .7870 MOA
37., EXCATM76: Home built AR-15, 5.56mm - 18" LaRue Stealth barrel, Geissele B-G2S-E Trigger, Vortex Viper 6.5-20x44 Mildot, Bobro mount - 77 grain SMK over 4895. Groups: .929"/.945"/.532"/.815"/.936" = Average .831" = .794 MOA
38.Skg_Mre_Lght: : DPMS Classic 20, Modified- Vortex PST 4-16x EBR-1 -Geiselle trigger- Handloads. Groups: .556"/ 1.261"/ .938"/ .582"/ .683"/ avg .927"= .8038 MOA:
39. Muad: Home-built SPR - LaRue MBT-2S - 20" LW barrel - Bushnell 6-24x50mm FFP, ADI 55gr BlitzKings. Groups: 1.099"/0.687"/0.628"/0.681"/1.125"/ avg. 0.844" = 0.806 MOA
40..Eric802:18" BHW barrel, PA 4-16x44 scope, 75gr BTHP handloads (LC brass, RE-15): .912, .731, 1.158, .720, .779; avg. .860", .821 MOA.
41. MadCowRacer, Rifle: 25DTI upper, Nikon 4-16 Monarch, Ammo: .257 caliber. 90Gr Sierra Game Kings. in 6.8SPC brass. Groups: (.642+ .753+ .883+ .883+ .948)/5= .8218
42.BuickDan/AR-15 18" SPR homebrew .223/RRA 2-stage trigger/Mueller APT 4.5-14X40/Hornady 55 gr V-max handloads Groups: .744" .864" .716" .885" 1.101" Avg= .862" .8231MOA
43. JohnTlag: Knights LPR - Leupold CQBSS - Handloads: 25 grains BLC-2 with 77 grain SMK's in LC brass.. .736,.726,.581,1.030,1.070 = .829 MOA
44.Southerncross  Larue Stealth 20" barrel/Stealth upper, Larue PredatAR lower with MBT Vortex Viper 6/24x50 Groups: .601, .716, .776, .859, 1.406 AVG size .8716 x 1.047 = .8324 MOA
45..lb6r DPMS 24" Stainless steel, JP trigger, ADM Mount and UsOptics SN3, Harris Bipod, Gemtech Sandstorm. 175 SMK over 44 Varget Win caseGroups .58"/.62"/.98"/.95"/1.21" = Avg .868" = .83moa
46.jaqufrost: Home built, 5.56 - 1:14 twist Green Mountain Rifle Barrel, CMMG trigger- Weaver 2-10x36 MDR- Federal 50gr Polymer Tip. Groups: 1.342"/1.251"/.832"/.762"/.495" = avg. .936" = .836 MOA
47. Marcdjudge: LaRue OBR .308 16" - Geissele SSA-E + LaRue/Harris bipod + STR - Vortex Viper PST 4-16x in LT mount, 168gr FGMM, Groups .724 / .923 / .97 / .471 / 1.314 = 4.412 divided by 5/1.047 = .8427 average
48. tweeter, assembled 5.56mm 416R stainless 1:8 w/ Geissele SSA-E, Vortex PST 1-4x, handloaded Barnes 69gr over IMR 4320. 0.823"/ 0.919"/ 0.895"/ 0.877"/ 0.746" = 0.852" AVG.
49. H60Hdrvr, SunDevil-built lefty upper with 20" 1-8 LW match barrel, homebrew lower with Geissele SSA-E, Nikon M223 3-12x42, IMI Razor Core 77gr Match; groups: .992"/.696"/.966"/.949"/.870", avg .895"= .855 MOA
50 JoeyS, Larue stealth upper 18", RRA lower with Larue MBT with the A2 stock. Nightforce 5.5-22x NP-R1 Groups: .863"/ .849"/ .856"/ 1.053"/ .859" = avg. .896" = .856 MOA
51 MrsExCatm: Home built AR-15, 5.56mm - 18" LaRue Stealth barrel, Geissele B-G2S-E  - Vortex Viper 6.5-20x44 Mildot, Bobro mount - 77 grain SMK over 4895. Groups:1.046"/1.239"/.766"/.682"/.766" = Average .8998" = .859 MOA
52.GardensandGuns: BCM 18" upper/Stag Lower 5.56- G2S Trigger, Harris Bipod-Vortex Pst 4-16x, Hornady 55gr V-Max Varget. Groups: .871"/.896"/.954"/1.018"/.776" =Avg.903" = .8624 MOA
53..steelheadr BCM 875-.224 = .651 1.263-.224 =1.039 1.369-.224 =1.145 1.025-.224 = .801 1.105-.224 = .881 =4.517/5=.9034/1.047=.863
54.Mister_H: Home built AR15 White Oak SPR profile Wilson barrel 1/7 twist, Leupold mk4 4.5-14x, IMI 77grn “Razorcore”, Groups: .959/.776/1.029/.706/.983 = avg. .891 = .866 MOA  
55. EVR: ArmaLite M15NM 5.56 - Factory Condition {polished trigger} - Redfield 4-12 scope PA Mount - Groups: 1.016/.852/1.079/.853/.733 = avg. .9066" = .866 MOA
56.ean: HCS/Douglas 18" SPR Barrel, Geissele SSA-E trigger, Vortex Viper PST 6-24x50 - Federal GMM 77 grain. Groups: .457" / 1.294" / 1.186" / .821" / .821" = avg. .9158" = .875 MOA
57..Lennyo3034: LRB M25 in .308, Krieger barrel, Vortex Razor 5-20X50, Federal GMM 168grain. Groups: .983", .849", .706", .909", 1.167"= .922" average= .881 MOA
58.Face454 26" 6.5 Grendel Bartlien Barreled Precision Firearms Upper Nightforce 8-32x56, 123gr Hornady AMAX: 1.018, .692, 1.248, 1.065, .602 AVG: .925", .883 MOA
59.AR-180: Stag Lower with a Varmint parts kit, Bushnell Scope, 0.618" / 0.994" / 0.560" / 1.143" / 1.116" = 4.431" / 5 = 0.8862"
60. arzombie: Frankengun .223 - 13.7" Rainier Arms Ultramatch- Vortex 2.5-10x32- 69gr SMK, IMR 3031 - Groups: 1.407"/1.284"/.830"/.639"/.939" = avg. 1.0198" = 0.893 MOA
61. trobertson5-0:Knight's Armament SR15 5.56- Kreiger barrel- Leupold MK 1.5-5 SPR- MK262 76 gr. Groups: .889"/ 1.449"/ 1.04"/ .419"/ .924"/ avg .944 = .901 MOA
62.sgwlower 16" Larue Predatobr with NF 2.5-10X24 77 gr FGMM Bipod, rear bag .855 moa,.841 moa,.917 moa,1.011 moa, .895 moa AVG MOA: .903 moa
63.Draconis: Larue stealth upper 18", 1/8 twist, RRA lower Nightforce 5.5-22x NP-R1. Hornady Match HPBT 75 gr.,0.807", 1.069", 1.097", 0.727", 1.037" = 4.737" / 5 = 0.9474" = .905 MOA
64.Dangerranger61007: built AR15, Rainier Ultramatch 18" SPR barrel, Larue MBT Bushnell DMR 3.5-21x in a Larue LT158 mount. 77gr SMK (23.2gr XBR 8208) Groups: 0.749, 1.059, 1.122, 0.96, 0.854 = avg 0.9488 AVG 0.906 MOA"
65. doc540: Anderson 5.56/.223, 16", stock 6lb 13oz trigger, 1/8 twist, Mueller 8.5x25x50, 50gr Hornady Vmax, handloads, GROUPS: .716 / 1.08 / .726 / 1.52 / .686 = .948 avg or .909 MOA
66 Gahunter95. Larue Stealth upper 18", 223, RRA lower with Larue MBT with A2 stock, Atlas bipod. Nightforce 5.5-22x NP-R1. FGMM 77gr. Groups 1.405, 0.642, 0.679, 1.225, 0.829. = 4.780 / 5 = 0.956. 0.913 MOA
67.DeltaFINN: Rainier Arms medcon select 18", Geissele SSA-E, Nightforce nxs 2.5-10x32, Federal GMM 69gr SMK, bipod and rear bag Groups: 1.126" .925" .990" .593" 1.156" = avg .958" divide by 1.047 = .914 MOA
68.RLR350, AR in 5.56 builtWilson Combat 18", 1/ 8, rifle gas, SPR barrel, RRA match trigger, billet upper /lower, Leupold 1-9x40 scope..loads: Hornady 68g BTHP/24g Varget. Groups: 1.177"/.952"/.625"/.1.107"/.718" Average: .9158" MOA
69.Ronnl001/Les Baer thunder ranch ar15/.596+.625+.965+1.023+1.168+1.392"/6=.9615" = .918 MOA AVERAGE.
70.jaqufrost: home built 5.56 - DPMS MK12 barrel, Geissele SD-C - Vortex Viper HS-T 5-15x - 77gr SMK 23.4gr Varget/23.5gr Varget. Groups: .636"/.888"/1.407"/1.555"/1.158" = avg. 1.1288" =.921 MOA
71.Meme,  LaRue 20" Stealth upper  Vortex Viper HST 6-24X50  LT845-QD Handloaded 69 grain SMK Groups.867 + 1.468 + .698 + .626 + 1.173 = 4.832 / 5 = .9664.9664 / 1.047 = .923 MOA
72.itgoesboom, Larue Stealth 5.56, SSA-E Trigger, Leupold VX-R 3-9X on 9 power, 77gr Noslers over H322 handloads. Groups: 1.021, 1.004, 1.003, 1.094, 0.754 = 4.876/5 = 0.975/1.047 = .931 MOA

Start with a White Oak Armament (WOA) barrel with a Wylde chamber and 1:8 twist. Make sure the lower has a good trigger, I like Geissele SSA 2.5lb x 2lb two stage for a do it all lower, or the less expensive version the G2S. Work from there...

This is good advice. I'd go with an SSA-E for tightest groups, but the SSA can easily do it as well.

I used to own a RRA 20" bull barreled upper on a bushmaster lower with a Jewel trigger installed. With black hills 55 grain soft points I could keep 5-shot groups at around 3/4". (I still regret selling it although there were several years where life did not give me much opportunity for shooting.)
On one particular day there was this guy at the 100 yd range shooting some tricked out .308 with a custom case and all the bells and whistles you would want for precision shooting.
We got to talking and then I let him shoot my RRA. He put 4 shots in one ragged hole and the 5th right next to it. It measured out at something like .45 inch! Crazy.

Sadly, when I fired his rifle the groups were not nearly as tight as when he fired it.

Long and fat Lilja pole for $200

This is my Colt MT6700 with a Wilson 22" barrel and a Timney trigger @ 3lbs, this is on a good day, humid as hell and no wind, 10 shots @100 yds. I have better results with a 5.56 chamber over a Wylde chamber shooting 62gr match grade ammo. IMO you do not need a full upper to get good results.
The specs are:

• Chamber – 5.56 
• Barrel Thread – Target Crowned
• Barrel Twist – 1x8 Air Gauged
• Barrel Steel - 416R Stainless Steel
• Barrel Finish - Nitride Processed Black
• Gas System – Rifle Length Gas System
• Gas Block Platform - .937 Gas Block platform
• Diameter of the Barrel under the HG = 1.05" 
• Feed Ramp - M4 Feed Ramps
• Barrel Lining - Chrome

This.

You can get subMOA with factory ammo, just need to find the right ammo for you right barrel. My Odin Works 18" DMR loves AE MIL-SPEC 223.

Another vote for OdinWorks. I have the 18" 3gun barrel. It'll do 10shots at about .6" with handloads from a rest with CMC 3.5lb flat trigger.

I have a G2S that I can put in it. WOA seems like a good plan and 1/8
I have a few standard lowers. I my use my RRA lower since it has a tight fit with uppers.
I'll get a 10 power scope for it

Let us know how it goes.  It sounds like a really good plan.

If you're shooting 2 MOA with milspec ammo regularly, you might just be able to wring out sub moa regularly with match ammo and a good barrel / trigger / magnification.

I've said in the past that 9x-10x is pretty much perfect for 100 yard groups shooting.  I guess you could go a little higher but I feel like going too high just creates so much movement in any little input that it gets annoying.  A fixed 10x would be sweet because it will probably have better clarity than a variable.  Comparing similar quality of course.

LaRue is a safe bet. I have 2 18" barrels that shoot amazing. Ones a lighter weight predatar and the other is a stealth. Also I have a faxon 18" and a baliistic advantage that shoot sub moa. None are bull barrels. All are 1/8 twist and stainless. You shouldn't need a long barrel for a sub moa barrel and even some 14.5/14.7 barrels shoot sub moa.

This is what I was going to point out. Hint hint OP.

One of the most accurate rifles I have ever owned was a Rock River Varmint, 16", SS bull barrel.  The upper was on a Rock River NM lower.  This rifle was so good, that I am putting another one together in the hopes of getting a repeat.  I may have had an exceptional barrel, lucked out, what ever, but this was a very accurate rifle.

My Larue is more accurate, but I also paid 3X for it than the RRA I put together back then.  Good luck.

77

I would take a hard look at White Oak Armament's complete varmint uppers.

Here's a target I shot a couple of weeks ago with my WOA 20" varmint barrel. It's the first ten shots after a thorough cleaning. Shots 1-3 were in the berm to foul the barrel. Shots 4-5 are the dispersed shots. Shots 5-10 are the holes that are touching (I'm about 90% sure they were shot consecutively). They're .417 moa. I don't always shoot groups like this, but when I do, I post them on arfcom.

What ammo are you using

That target was shot with American Eagle 50 grain varmint tips. Twist is 1-8, btw.

Long and bull barrel fat are not necessary to shoot sub-MOA. True bull barrels are unnecessarily heavy in most instances.   Length is possibly a detriment to weight and rigidity unless you need to maintain velocity out beyond 500-600 yards.   A shorter stiffer barrel can work better.

I have a 16" Lilja M4 Navy barrel (their original SEAL Recon barrel, still available).  Sub 1/2 MOA target with match handloads is below.   That chrome moly longer Lilja barrel for only $200 would be very tempting, however.   Personally, I went shorter and have been very happy with the result.

I would favor putting a custom barrel on an existing upper than trying to get a complete upper.  I'm also posting two other targets that show what happens when you get a 10 mph cross wind at 100 yards and fail to correct for it, and one more target that simply shows how human error can destroy groups despite the inherent accuracy of the barrel.  Even at 100 yards, the human element -- me -- can spoil a great shooting barrel.  I don't count 3 shot groups, so those wide shots in a 5 shot group are on me, not the barrel.



This one become .986" still sub-MOA, instead on sub 1/2 MOA because I failed to adjust for the wind gust.



Another example.   When barrels get this accurate, the shooter becomes the defining factor.  I didn't put the calipers on this one, but it is approximately .8 to .9 MOA even with the wind influence.  The other four are close to 1/4 MOA, but it is still a 5 shot sub MOA group, because of the nut behind the trigger.



Or this one for which I offer no excuse.  It is simple failure on my part to maintain proper trigger discipline.  Still under 1 MOA, but could have been under 1/2 MOA had I done my part.   In each instance the barrel is far better than the shooter.  We are not talking sub-MOA with this class of barrels, but rather sub 1/2 MOA, if the ammo is capable and the  shooter does his part.



My point is that getting a match grade barrel from Lilja, Kreiger or such, may be a better option than trying to get this level of accuracy in a complete upper.   FWIW, the Recce barrel is 1:8 twist, Wylde chamber, 416 stainless, heavy under the handguard, stiff  but not bull barrel from the gas block forward. It is actually 17" counting the barrel extension.  It is hand lapped by Lilja.   You can expect similar results from Kreiger or other custom barrel makers.  To get this level of accuracy, you do need attention to the lower as well, particularly with the trigger.   This build uses a Geissele SSA-E with a 1.2 lb. second stage.  All accuracy deviations above 1/2 MOA are on me when I shoot this rifle.  I cannot blame the setup or anything or anyone else.  I'm 67 years old, with eyes and trigger finger to match, so you younger guys can probably do much better.

Good shooting old man.    What ammo were you using?  It looks like handloads for that first group but not sure about the rest.

Trigger finger could be a bit more steady, I guess.  Bifocals don't help, but the rifle is amazing.

Yes, all those were handloads with the short range flat base Berger 52's.  Same recipe as shown on the bottom of the first target.  Amazing what a little wind will do to light bullets.

I have some targets with 77 grain SMK's over RL-15 that are good, but not quite as tight.  I'm playing with some Berger 77 OTM's right now that are probably a little bit more accurate and are longer, better BC than the SMKs.  Stay tuned.  If my shaky trigger finger and old eyes don't mess me up, I think those Berger 77's may be as good as the 52's and way better at longer range than the SMK's and that's saying something.