The MK1 is the first upper in a series of custom uppers. Focusing on bringing the highest value and performance possible in an affordable way.
The Basics
11.3" Ballistic Advantage Hanson 5.56 Upper, 9.8" KAK 7-Sided Mlock Rail, AO Precision TMS BCG, Mil-Spec Upper, & Mil-Spec Charging Handle
The Specifics
Barrel:
Manufacturer - Ballistic Advantage
Length/Chamber - 11.3" 5.56
Twist - 1:7 Twist
Material - 4150 Chrome Moly-Vanadium
Profile - Hanson
Gas System - Carbine
Finish - Nitride
Thread Pitch - 1/2x28
Gas Port - .072
*Pinned Gas Block*
1st Rebarrel - FREE
All NFA/ATF Rules Apply
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:
Brand: AO Precision
Bolt Material - C158 Alloy
Carrier Material - 8620 Alloy
Gas Key Material - 4130 Alloy
Profile - Full Auto
Finish - Phosphate/Chrome
Gas Key Screws - Grade 8 (torqued and staked to Mil-Spec)
Forward Assist Cuts
Mil-Spec Firing Pin (Hard Chrome Coated)
*Individualy MPI/HPT tested
Handguard:
Manufacturer - KAK
Length - 9.8"
Material - 6061 T6 Aluminium
Finish - Hard Coat Black Anodization
Mounting Platform - Mlock
Barrel Nut - Steel (does not require timing)
Wedge Lock Attachment
Barrel nut torqued to 50 FT-lbs
Wedge Lock is tightened to 60 IN-lbs
Upper Receiver:
Manufacturer - Anderson/Aero
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...
Gas Block:
Material - 4140 Steel
Finish - Nitride
Style - Low Profile
Size - .750"
Attachment Method - 2x Set Screws
Not Adjustable
Pinned
Set screws are torqued to 25 IN-lbs and have High-Temp threadlocker applied for extra security.
Gas Tube:
Length - Carbine
Material - Stainless Steel
Flash Hider:
Manufacturer - KAK
Type - A2
Material - 4140 HT Steel
Thread Pitch - 1/2x28
Caliber - .223/5.56
MK1 - 11.3" Hanson 5.56 Complete Upper Receiver
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.