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Discussion Starter · #1 ·
Hey guys, ive been wanting to get into longer ranges and thought would be cool to do so in a ar15 platform, i was initially planning on maxing out at 500 yards but figured since i have a 1000 yard range about a hour or so away from me i might as well go for broke. I did quite a bit of research and was interested in the 6.5 grendel but while the 6.5 grendel is good for hunting at medium range it is lacking in the capabilities of staying sub sonic to 1000 yards. I could have went the ar10 route but i already had a spare ar15 lower. Although the 6 Arc is relatively new it looks like a promising cartridge. I will keep the thread updated with my build and range results when its complete
 

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Discussion Starter · #3 ·
Ordered a compete 6mm Arc upper from Atheris Rifle Company, all reviews ive found have been positive, the only negative ive found is the lead time. I ordered the upper at the beginning of march, spoke with them before i ordered and they are expecting barrels some time in mid April. The lead time is usually around 10-12 weeks so i hope to get it by July.

heres the specs on the upper


Atheris Rifle A-15 M (Match) upper offers shooters features for hunting and long range shooting with a very carefully selected mix of parts that make this setup very capable for whatever you throw its way.
  • Atheris Forged Mil Spec Receiver
  • 20” Atheris 416R Stainless Steel Barrel w/ 5R Rifling
  • Guaranteed Sub MOA (1"@ 100yds)
  • 1:7.5 Twist
  • Atheris Black Nitride BCG
  • Atheris 15" MLOK Handguard
  • Strike Industries Charging Handle
  • Adjustable Gas Block Available As an Option
  • Strike Industries Dust Cover
  • A2 Comp or Thread protector included (Depending on current stock)
 

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Discussion Starter · #4 ·
I did something i kinda feel guilty of lol, i originally was going to use the PSA lower i had but swapped it for the Aero Precision M4E1 enhanced lower that i had bought so my dad could build a ar47, i bought the Aero lower at the time because my LGS was out of the PSA lowers. Since his is more or less for open sight plinking i took all the internals out of the Aero lower and put them in the PSA lower. One main reason i decided to swap to the Aero M4E1 lower was it having a tension screw to eliminate play in the upper. Plus the Aero M4E1 just looks better imho
 

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Discussion Starter · #5 ·
After a few weeks of gathering parts i have the lower completed.

specs on the completed lower


  • Aero Precision M4E1 enhanced lower
  • Aero Precision enhanced carbine length buffer tube
  • Aero Precision H2 buffer and carbine length spring
  • Battle Arms Development enhanced safety selector
  • Battle Arms Development enhanced magazine release & magazine catch
  • Larue Tactical MBT-2S 2 stage trigger (2.5 lbs first stage) and (2 lbs second stage)
  • Magpul B.A.D lever
  • Magpul PRS Lite fixed stock with adjustable LOP and comb
  • Anarchy Outdoors precision rifle grip
  • Strike Industries ultralight takedown/pivot pins
  • Milspec bolt catch, springs and detents
I like the look of the Magpul PRS Lite stock, it mounts pretty solid considering it uses the front qd socket to both lock up in front of the notch on the buffer tube and squeeze down on the buffer tube. It was a little loose for my liking on the Aero Precision buffer tube, not loose where its flopping around but depending on the buffer tube the notch may vary, so what i experienced was with the locking mechanism tightened up the stock would slide about 1/4” back and forth, however you did have to pull on it pretty good to move it. It annoyed me so i cut a rubber shim for the notch in the buffer tube where the locking mechanism sits to take up the slack and it is solid now. Again not a deal breaker as it was but im picky lol.

I decided to install a Magpul B.A.D lever to ease with bolt operation and lock back while on a bench rest.

I made my decision on the Larue Tactical 2 stage trigger over the Timney Impact trigger that cost around $20-30 more. From the info i gathered the larue has a cleaner break and better reset than the Timney Impact trigger although the Timney is supposed to have less creep. But after installing the Larue it feels great! If there is any creep it is almost non existent.

I really like the Anarchy Outdoors precision rifle grip, the shelf on the right side is where you rest your thumb to allow you to pull your trigger finger straight back instead of applying side pressure like you would with a normal ar grip, also the 0 degree grip angle should help with comfort for precision shooting. The grip can also be used like normal as well.


Air gun Trigger Wood Grey Gun barrel



Air gun Trigger Gun barrel Wood Composite material



Air gun Trigger Wood Gun barrel Gun accessory



Air gun Trigger Gun barrel Gun accessory Gas



Wood Trigger Gun barrel Air gun Gun accessory
 

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Following for sure. Any concerns that mixed brands upper/lower will impact the accuracy? I have been using matched billet upper/lowers for my more precision AR builds. No real evidence that it makes any difference. The upper and lower fit is extremely tight. Now I need to take a look at that 6mm ARC round. That is new to me.
 
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