The MK3 is our 3rd custom upper in a 14.5" variant. I saved a few uppers from being pinned and welded to give some people options for other muzzle devices in the future. Feel free to inquire about specific muzzle devices or configurations you would like to order. These are Do-It-All uppers build to be extremely accurate, reliable, and affordable. First rebarrel is still free and every component has a lifetime warranty.
 
Each upper ships with a unique checklist noting the ejection pattern with brass cased ammunition, function, lock back on empty, and any buffer/spring recomendations I may have.
 
The Basics
 
14.5" Ballistic Advantage 5.56 Upper With Pinned & Welded VG6 Flash Hider, 13.7" Breek Arms Mlock Rail, Toolcraft NiB BCG, Pinned Gas Block, Mil-Spec Upper and Charging handle
 
The Specifics
 
Barrel:
Manufacturer - Ballistic Advantage
Length/Chamber - 14.5" 5.56
Twist - 1:7 Twist
Material - 4150 Chrome Moly-Vanadium
Profile - Government
Gas System - Mid-Length
Finish - Nitride
Thread Pitch - 1/2x28
Gas Port - .081
*Dimpled*
*Gas Blocks Are Pinned*
1st Rebarrel - FREE
 
All NFA/ATF Rules Apply
 
Ballistic Advantage makes good stuff and these are no different. The 14.5" Performance series is gassed perfectly with a .081" gas port on the midlength gas system. Recoil is negligible and ejection and extraction is strong and consistent. I recommend a standard carbine spring and buffer as these are gassed right in the sweet spot so nothing special is required, though you can always tune to your desired feel. These are very accurate barrels, I expect around 2MOA accuracy with good ball ammo and 1 MOA or better with good match loads.
 
Barrel nut is sequentialy torqued down to 50 FT-lbs. Starting at 25, then 35, and then finally 50 FT-lbs to ensure proper mating of the threads. 
 
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:
Manufacturer -Toolcraft
Bolt Material - 9310 Alloy
Carrier Material - 8620 Alloy
Gas Key Material - 4130 Alloy
Profile - Full Auto
Finish - NiB
Gas Key Screws - Grade 8 (torqued and staked to Mil-Spec)
Forward Assist Cuts
Mil-Spec Firing Pin (Hard Chrome Coated)
 
Handguard:
Manufacturer - Breek Arms
Length - 13.7"
Material - 6061 T6 Aluminum
Finish - Hard Coat Black Anodization
Mounting Platform - Mlock
Wedge Lock Attachment
 
Barrel nut torqued to 50 FT-lbs
Wedge Lock Tightened Down to 60 IN-lbs with Blue Loctite
 
Upper Receiver:
Manufacturer - Anderson
Material - 7075 T6 Aluminum
Machined from Forged Aluminum
Finish - Type 3 Hardcoat Anodized Black
Standard Forward Assist
Standard Dust Cover
M4 Feed Ramps
NOT T-Marked, if you care...
 
Nothing special here, everything is Mil-Spec (standard), which is the way that I like it for an upper receiver.
 
Charging Handle:
Material - 7075 T6
Machined from Forged Aluminum
Finish - Type 3 Hardcoat Anodized + Teflon Coated for Smoother Operation
 
Same here, standard and boring. High quality, high strength, enough said.
 
Gas Block:
Material - 4140 Steel
Finish - Nitride
Style - Low Profile
Size - .750"
Attachment Method - 2x Set Screws
Pinned
Dimpled Barrel
Not Adjustable
 
You shouldn't really notice a good gas block and this one is no different. High quality steel that's as tough as the barrel for longevity. Rear set screw fits into the dimple on the barrel, ensuring proper alignment and that the gas block won't shift on you.
 
Set screws are torqued to 30 IN-lbs. and have High-Temp threadlocker applied for extra security.
 
Gas Tube:
Length - Rifle
Material - Stainless Steel
Finish - Black Nitride
 
It's a stainless steel gas tube held in place with a roll pin, what more do you want?
 
Muzzle Device
 
VG6 Gamma Flash Hider
Finish - Black Nitride
Thread - 1/2x28
 
***any muzzle device you want can be substituted for an additional cost*** 
 
When Pinned and Welded in place this will bring the MK3 to a legal 16"+ If you do not want it pinned please write that down in the order notes!
 
If you have any questions or requests please leave them in the order notes!