Precision Rifle Build

[nightchief]

I wanted to build a .223/5.56 rifle capable of 1 MOA (100 yds) to 2 MOA (500 yards) for target shooting, varmint hunting, etc. The rifle is intended to be used mostly in the prone position and with optics only. I acquired the barrel a couple of years ago when LaRue Tactical was having a sale, so the build has bee evolving since. Lastly, I was inspired by Eurodriver's high wind shooting treatise as goal for the rifle (and the shooter).

Here are the specs:

Upper
• 18” LaRue Stealth SS barrel, mid-length gas system, Wylde chamber, 1:8 twist
• SureFire MB556K muzzle brake
• LaRue low profile gas block
• Geissele Mk 4 15” hand guard
• Vltor MUR upper receiver
• BCM bolt carrier group
• BCM Gunfighter Mod 4 charging handle

Lower
• Battle Arms Development forged lower
• BCM lower parts except for Battle Arms Development ambi selector and takedown pins
• LaRue MBT 2 stage trigger
• A5H2 buffer and Sprinco green action spring
• Magpul UBR G2 stock and A5/SR25 Receiver Extension

Accessories
• Nightforce SHV F1 4x14x50 Mil-R scope with LaRue SPR mount
• Harris bi-pod


I've got close to 1000 rounds through it so far, and it has been 100% reliable, running in temperature ranges between 23 degrees and 105 degrees. I've achieved 1.25 MOA at 100 yards and am consistently able (80%ish) to hit an 8" steel gong at 500 yards, in moderate wind, like 25 mph cross winds. A little better with light wind.

Attachment 46301Attachment 46302

Attachment 45189Attachment 45190

[Rogue556]

That's a sweet rifle. I really dig the parts you chose for this build. I'm *almost* done with a similar 18" precision build myself and I went with a NF 2.5-10x32 but may eventually go with more magnification like yours. I did go with a 1st gen UBR on my build after impatience sunk in. Hopefully the 2nd gen is a large enough step up to warrant switching.

Have you had a chance to try the 69gr Black Hills TMK? Markm has a thread on it and it seems to do very well.

Sent from my SM-N910P using Tapatalk

[nightchief]

That's a sweet rifle. I really dig the parts you chose for this build. I'm *almost* done with a similar 18" precision build myself and I went with a NF 2.5-10x32 but may eventually go with more magnification like yours. I did go with a 1st gen UBR on my build after impatience sunk in. Hopefully the 2nd gen is a large enough step up to warrant switching.

Have you had a chance to try the 69gr Black Hills TMK? Markm has a thread on it and it seems to do very well.

Sent from my SM-N910P using Tapatalk

Thank you. The BAD lower is the nicest machined lower I have worked with. Nicer than the Colt, BCM and Seekins lowers I have.

I have tried the BH 69 and 77 TMK's...the results haven't been as good as the Hornady 75 gr OTM or BH 77gr OTM...I hijacked part of Markm'a thread regarding this "Problem"...
https://www.m4carbine.net/showthread...K-Review/page7
NC

[artoter]

Wow, I'm impressed! Beautiful rifle...but you got some green tied up into that one!

[nightchief]

Wow, I'm impressed! Beautiful rifle...but you got some green tied up into that one!

Thank you. I built it over time, so it wasn't "too" painful. Acquired some of the higher dollar items during various sales too.
NC

[556BlackRifle]

Nicely done nightchief! Have you tried any of the V-Max loadings? I have two Recce rifles and have seen similar results with SMKs and have been downright disappointed with the Black Hills loadings I've tried. I've been much happier with the V-Max out of both of these rifles. Even the light weight bullets seem to perform well through the 1:7 barrels.

[nightchief]

Finally!!!

Attachment 46277

Oh yeah!!! First go with new stock and suppressor on Monday! Great way to enjoy the Independence Day holiday!

NC

[Hammer_Man]

Finally!!!

Attachment 46271

Oh yeah!!! First go with new stock and suppressor on Monday! Great way to enjoy the Independence Day holiday!

NC

Your attachment is not working.. Btw do you have the old style MK4 rail with the set screws, or the new style with the tabs? I only ask because I want to swap out the KAC URX 3.1 I currently have mounted to my MUR for a Geissele MK4.

[nightchief]

Your attachment is not working.. Btw do you have the old style MK4 rail with the set screws, or the new style with the tabs? I only ask because I want to swap out the KAC URX 3.1 I currently have mounted to my MUR for a Geissele MK4.

Ok, not sure why the pic wasn't displaying, but I have re-loaded the picture...

My Mk4 has the hex screws on the tabs against the upper receiver...I had no fit issues with the MUR upper

NC

[nightchief]

Ran it today for the first time with the UBR G2 stock and suppressor. Love the stock! Definitely worth the wait. UBR feels lighter than the SL-S stock I was running previously. 30 uneventful, boringly reliable and accurate shots with Hornady 75gr OTM and BH 223 77 gr SMK on an 8" gong at 300 yards. Virtually automatic at this range. Conditions at 0800 were 83 degrees with 7 mph NE wind.

Attachment 46311Attachment 46312Attachment 46313

I wanted to build a .223/5.56 rifle capable of 1 MOA (100 yds) to 2 MOA (500 yards) for target shooting, varmint hunting, etc. The rifle is intended to be used mostly in the prone position and with optics only. I acquired the barrel a couple of years ago when LaRue Tactical was having a sale, so the build has bee evolving since. Lastly, I was inspired by Eurodriver's high wind shooting treatise as goal for the rifle (and the shooter).

Here are the specs:

Upper
• 18” LaRue Stealth SS barrel, mid-length gas system, Wylde chamber, 1:8 twist
• SureFire MB556K muzzle brake
• LaRue low profile gas block
• Geissele Mk 4 15” hand guard
• Vltor MUR upper receiver
• BCM bolt carrier group
• BCM Gunfighter Mod 4 charging handle

Lower
• Battle Arms Development forged lower
• BCM lower parts except for Battle Arms Development ambi selector and takedown pins
• LaRue MBT 2 stage trigger
• A5H2 buffer and Sprinco green action spring
• Magpul UBR G2 stock and A5/SR25 Receiver Extension

Accessories
• Nightforce SHV F1 4x14x50 Mil-R scope with LaRue SPR mount
• Harris bi-pod


I've got close to 1000 rounds through it so far, and it has been 100% reliable, running in temperature ranges between 23 degrees and 105 degrees. I've achieved 1.25 MOA at 100 yards and am consistently able (80%ish) to hit an 8" steel gong at 500 yards, in moderate wind, like 25 mph cross winds. A little better with light wind.

Attachment 46301Attachment 46302

Attachment 45189Attachment 45190