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SD Pro - 8.3" .300 Blackout

The SD Pro is our first .300 Blackout upper and is intended for use with a suppressor that fits under the handguard. The Aero Enhanced handguard has an ID of 1.72" and should fit all 1.5"-1.6" OD cans. These have a 8.3" BA Hanson barrel under the 10.7" Aero handguard and come with a KAK flash can to extend beyond the front of the handguard. 


These are setup for mixed ammo and should run everything right out of the box. However some subsonic ammo may require lighter springs or buffers when unsuppressed. 


The Basics


8.3" BA Hanson barrel, Aero Precision 10.7" Enhanced Mlock Handguard, Chrome/Nitride BCG,  Aero M4E1 Upper, and Aero Breach Charging Handle


The Specifics



Manufacturer - Ballistic Advantage

Length/Chamber - 10.7" / .300BO

Twist - 1:7 Twist

Material - 4150

Profile - Hanson

Gas System - Pistol

Finish - Nitride/NIB

Thread Pitch - 1/2x28

Weight - 19oz

Factory Pinned


1st Rebarrel - FREE


Barrel nut is sequentially torqued down to 50 FT-lbs. Starting at 25, then 35, and then finally 50 FT-lbs to ensure proper mating of the threads. 


Barrel is also bedded to the upper receiver with an expanding/hardening compound to ensure perfect fit and reliable accuracy. 


If you legit burn out a barrel, like 10,000 -25,000 rounds, and the barrel becomes inaccurate I will rebarrel it for you for free. Good luck.



Bolt Carrier Group:

Bolt Material - 9310 MPI

Carrier Material - 8620 Alloy

Gas Key Material - 4130 Alloy

Profile - Full Auto

Finish - Chrome/ H&M Nitride

Gas Key Screws - Grade 8 (torqued and staked to Mil-Spec)

Forward Assist Cuts

Mil-Spec Firing Pin (Hard Chrome Coated)



Manufacturer - Aero Precision

Length - 10.7"

Material - 6061 T6 Aluminum

Finish - Hard Coat Black Anodization

Mounting Platform - Mlock

Barrel Nut - 7075


Barrel nut torqued to 50 FT-lbs



8 handguard set screws are torqued to 10-inch pounds for easy removal and installation of your suppressor. Re-instal to 25 in-lbs with blue loctite. I can also do that here if you plan on using the flash can for a while. 


We apply a Permatex Anti-Seize solution to the receiver extension before installing the barrel nut to ensure they do not lock up over many years of hard use. 



Upper Receiver:

Manufacturer - Aero M4E1

Material - 7075 T6 Forged Aluminum

Finish - Type 3 Hardcoat Anodized Black

Standard Forward Assist

Standard Dust Cover

M4 Feed Ramps



Charging Handle:

Manufacturer: Aero Precision Breach

Material: 7075 T6 Aluminum

Finish - Type 3 Hardcoat Anodized

Extras - Machined in cuts to deflect gas when shooting suppressed. 


Gas Block:

Material - 4140 HT Steel

Style - Low Profile

Size - .750"

Attachment Method - 2x Set Screws

Factory Pinned

Not Adjustable


Set screws are torqued to 30 IN-lbs and have a high temp threadlocker applied for ultimate security.


Gas Tube:

Length - pistol

Material - Stainless Steel

Finish - Black Nitride


Flash Hider:

Kak extended flash can

Thread Pitch - 5/8x24

Caliber - .300

SD Pro - 8.3" .300 Blackout

Out of Stock
  • Our stated policy is to not accept returns, but if you accidently ordered the wrong item or there was a mistake or if you have any issue at all send us an email (listed in the "contact us" section) and we will work it out.

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