Q&A for Aero Precision AR15 8in .300 Blackout Barrel Complete Upper Receiver with Flash Hider

Aero Precision AR15 8in .300 Blackout Barrel Complete Upper Receiver with Flash Hider

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DangerousMullet, member, from GA, United States, asked on May 22, 2020

Does this come with a BCG and charging handle?

Manufacturer Answer

Answered by Aero Precision USA, Manufacturer from WA, United States, on January 20, 2021

This upper receiver does not include a BCG or Charging Handle

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bryan, guest, from FL, United States, asked on November 22, 2019

barrel material ??

Expert Answer

Answered by Jonathan D., Gear Expert, from IL, United States, on March 19, 2020

It is 4150 CMV.

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AJ, member, from WA, United States, asked on February 26, 2023

What is the thread pitch on the muzzle brake?

Expert Answer

Answered by Ethan, Gear Expert, from IL, United States, on February 28, 2023

The Aero Precision AR15 8in .300 Blackout Barrel Complete Upper Receiver includes an A2 style flash hider with 5/8x24 threads.

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Cheezwiz, member, from MO, United States, asked on July 10, 2022

How many m-lok slots will I find in the 12 o'clock position on the 7" M-LOK ATLAS S-ONE Handguard?"

Expert Answer

Answered by Hunter, Gear Expert, from OH, United States, on July 26, 2022

The 7.3" MLOK ATLAS S-ONE handguard has no MLOK slots at the 12 o'clock position.

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Sean, member, from VA, United States, asked on May 08, 2022

What type of bolt carrier does .300 Blk Out require? 5.56 or 7.62?

Answered by Jon M, member, from VA, United States, on May 21, 2022

300aac is a necked down 5.56, so any standard .223/5.56 BCG should work fine.

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Mitchell R Sharp, member, from WA, United States, asked on November 23, 2021

Which Aero lower will this mate up to?

Expert Answer

Answered by Ethan, Gear Expert, from IL, United States, on January 14, 2022

The Aero Precision AR15 8in .300 Blackout Barrel Complete Upper Receiver will fit any Mil-Spec AR15 lower whether it be Aero Precision, Radical Firearms, Daniel Defense etc.

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MC, guest, from IL, United States, asked on October 04, 2021

What is the best buffer for the 8" 300 blackout pistol build?

Expert Answer

Answered by Ethan, Gear Expert, from IL, United States, on January 14, 2022

For the Aero Precision AR15 8in .300 Blackout Barrel Complete Upper Receiver, I would recommend using an H3 buffer (5.0oz-5.4oz) in order to minimize recoil and ensure reliability.

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Doc, guest, from AZ, United States, asked on November 17, 2020

I’m building a SBR. What is my minimal barrel length, to maintain FFL rules ?

Expert Answer

Answered by Tom B, Gear Expert, from IL, United States, on September 30, 2021

You would need to reach out to your local ATF office to confirm any regulations/legalities.

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DevD, member, from ID, United States, asked on September 01, 2020

Will it fit ok on a seekins NX15 lower?

Expert Answer

Answered by Tom B, Gear Expert, from IL, United States, on September 30, 2021

Yes. it will fit on the Seekins lower.

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James, member, from NC, United States, asked on July 29, 2020

What is the difference between the two?

Expert Answer

Answered by Tom B, Gear Expert, from IL, United States, on September 30, 2021

APAR610601M1: AR15 Complete Upper w/ No Forward Assist, 8" .300 Blackout Barrel, 7" M-LOK ATLAS R-ONE Handguard - Anodized Black
APAR610501M1: AR15 Complete Upper w/ No Forward Assist, 8" .300 Blackout Barrel, 7" M-LOK ATLAS S-ONE Handguard - Anodized Black

The handguard is different.

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Q&A for Aero Precision AR15 8in .300 Blackout Barrel Complete Upper Receiver with Flash Hider — 15 Questions & 17 Answers