AR-15 Unassembled Rifle Upper Receiver Components:
Forged 7075-T6 Mil-Spec Stripped upper receiver
5.56 Nato barrel
Matched-color dust cover
Matched-color forward assist
Gas Block (diameter varies depending on barrel)
Gas Tube (length varies depending on the barrel)
A2 Bird Cage Flash Hider with crush washer (Our Round Muzzle Brake will be attached to uppers going to California to comply with local laws).
Muzzle device will be parkerized or stainless steel (it will match the barrel material).
15’’ Matched-color M-LOK Free Float Handguard
Full-auto bolt carrier group, made in the USA
Standard charging handle
 
Twist Ratios:
5.56 Nato Barrels are 1:7 Twist
 
AR-15 Lower Receiver Components:
Lower parts kit
Mil-Spec Buffer Tube (Commercial set available on request)
Castle nut
End plate 
Mil-spec Stock with built in sling adapter (Commercial set available on request)
Buffer Spring
Buffer
 
What will you need to finish your AR-15 Unassembled Rifle Build Kit?
You are almost finished! There are still two things that you will need to complete this AR-15
You will still need an AR-15 Stripped Lower Receiver (FFL & Background Check required)
You will also need a magazine that is suitable for your desired caliber.