BOTW: .224 Valkyrie by BKKSW

Tom R
by Tom R

Our Fourth Installment of Build of the Week was contributed by BKKSW. Clearly, the new hotness in many circles is the .224 Valkyrie. I’m hoping we can get a couple variants in to run for review in the near future. BKKSW’s rifle comes in at just over 7 lbs with a reported 0.12 split time on shots.

Keep the submissions coming in!

You can submit your own build at https://www.thefirearmblog.com/blog/build-of-the-week-submission/


20″ .224 Valkyrie topped with a Leupold 3-18×44 Mark 6 with an H59 reticle and Larue LT104 34mm QD mount.

  • Aero Precision Gen II upper/lower set.
  • Midwest Industries G3 Lightweight ML-series free float handguard.
  • Magpul MOE+ Grip pistol grip and Magpul ACS stock.
  • BSF 20″ carbon fiber fluted barrel 1-7 and a Superlative .875 O.D Adjustable set screw style gas block and rifle length gas tube and a JM style brake.
  • Lantac enhanced fully supported bolt carrier with a JP 6.8 spcII bolt (upgraded with BCM gas rings and extractor spring kit),
  • BCM lower parts,
  • V7 Hybrid 57-degree right-hand selector,
  • 2A takedown pins,
  • Geissele SSA-E (upgraded with JP hammer/trigger springs for a 2.5lb pull while still maintaining strong reset.Capable of .12 split times),
  • Vltor A5 buffer tube with A5 4.56oz buffer and Springco Rifle Green Buffer Spring.
  • PWS Ratchet Lock Sling Mount and castle nut.
  • 25 round ACS mags,
  • Blue Force padded sling and an Elite Iron Bipod with QD mount.

The goal was a sub 7lb rifle (turned out to be 7.2lbs without optic or bipod) you could carry further than to the car and back, that could be used from 3-gun to 1000+ meter precision depending on the optic.

This is a custom mixed Cerakote Elite finish. It did and didn’t turn out how I envisioned. I think I need to smoke the bright graphics or leave it off. People seem to love or hate it. I’m indifferent, but hopefully, it will stop that rare idiot who grabs it by mistake and tries to chamber his mag of 5.56mm.

The function is flawless. Not a malfunction from the time the gas block was adjusted. Very light recoil, you can spot your own shots with ease. Accuracy with the 75g American Eagle is spotty at best, from .4-1.5″. I seem to get a pattern of 3-4 rounds touching with 1-2 flyers. Frustrating. The 90g match maintains .4moa to 600m so far. Finding an adequate longer distance is difficult in my area. It’s apparent hand loads (or the new Hornady match loads) will be necessary to get the best from this rifle. The lighter weight adds makes it more difficult at distance, but if you settle down behind it prone it can get the job done.


Close in I have Vortex Crossfire red dot on a Kinetic Development Group Sidelock Aimpoint Micro compatible mount and it handles nearly as fast as a purpose built 3-gun carbine. POI shift is almost non-existent. This BSF barrel does what advertises. Would a Proof Research be better? Maybe, but I wouldn’t bet on it.

There’s a lot to learn about this round from terminal ballistics to load development, and more. Still, the lightweight AR-15 size/weight platform on a round this capable begs for further experimentation. Which of course is where most of the fun can be found.


Comment below to ask BKKSW questions about his build.

Tom R
Tom R

Tom is a former Navy Corpsman that spent some time bumbling around the deserts of Iraq with a Marine Recon unit, kicking in tent flaps and harassing sheep. Prior to that he was a paramedic somewhere in DFW, also doing some Executive Protection work between shifts. Now that those exciting days are behind him, he teaches wilderness medicine and runs an on-demand medical staffing business. He hopes that his posts will help you find solid gear that will survive whatever you can throw at it--he is known (in certain circles) for his curse...ahem, ability...to find the breaking point of anything.You can reach him at tom.r AT thefirearmblog.com or at https://thomasrader.com

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  • CM CM on Jul 08, 2018

    were you aware that to fully stablize the 90gr Sierra Matchking bullet you need a 6.5 twist rate in your barrel. That's the bullet that federal is using in their 90 grain load.
    Go to the Sierra website and look up their 90 gr Matchking and it will tell you that you need a 6.5 twist rate. Hornady recently introduced an 88 gr ELD match bullet/ammo for the Valkyrie and it too requires a 6.5 twist rate to be fully stable. If you go to the Berger website and put in the information on the new Hornady 88 gr bullet it will tell you that the bullet is marginally stable with a 1/7 twist rate. If you put in the information for the 90 gr Berger VLD....it will also tell you that with a 1/7 twist, the berger vld will be marginally stable. I think the rifle you built is a great rifle, but i feel you would get better performance with the 90 gr bullets in a 1/6.5 twist rate. I also am building an AR 15 platform for the new Valkyrie load, because I think that it is going to be a very popular round for distance shooting. I will be using a Bartlein barrel with a 1/6.5 twist. Other than the barrel twist, I do really like the gun you put together!

    • See 3 previous
    • Bkksw Bkksw on Jul 19, 2018

      @CM Federal just published a video concerning twist rate and they specifically addressed Sierra's 6.5 twist requirement though you have to listen carefully since it's easy to miss: https://www.youtube.com/wat...

  • CM CM on Jul 29, 2018

    I think you are pulling my leg about the great accuracy you are getting with the 90 gr heavier bullets in a 1/7 twist barrel. Go to the federal website.......they recently made an announcement about the lack of accuracy in their heavier 90gr loads. Why are you the only getting stellar accuracy in a 1/7 twist barfrel

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