Pin, Firing
Pin, Firing Pin Retaining
Carrier and Key Assy
Bolt
Ring, Bolt (3x)
Extractor
Pin, Extractor
Spring, Helical, Extractor
Ejector
Pin, Ejector
Spring, Helical, Ejector and Safety Detent
Handle, Charging Assy
Receiver, Upper
Cover, Ejection Port
Spring, Helical, Ejection Port
Pin, Grooved, Headless
Clip, "C"
Spring, Helical, Forward Assist
Forward Assist Assy
Pin, Spring, Forward Assist
Barrel and Barrel Extension w/ Front Sight Base Assy
Nut, Barrel
Spring, Slip Ring, Handguard
Cap, Handguard
Gas Tube and Plug
Pin, Spring, Gas Tube
Swivel, Sling
Rivet
Handguard Set
Post, Front Sight
Detent, Front Sight
Spring, Helical, Front Sight
Suppressor, Flash
Lockwasher/Compression Washer/Shims
Detent, Takedown and Pivot (2x)
Spring Helical, Takedown and Pivot (2x)
Pin, Takedown
Pin, Pivot
Guard, Trigger Assy
Pin, Spring, Trigger Guard
Trigger
Spring, Torsion, Trigger
Spring Helical, Disconnect
Pin, Grooved, Headless, Trigger and Hammer (2x)
Hammer Assy
Spring, Torsion, Hammer
Catch, Bolt
Spring, Helical Bolt Catch Plunger
Plunger, Bolt Catch
Pin, Spring, Bolt Catch
Extention, Receiver
Buffer Assy
Detent, Buffer
Spring, Helical, Buffer Detent
Spring, Helical, Action
Lever, Selector
Detent, Safety
Grip, Pistol
Screw, Grip
Washer, Lock
Button, Magazine Catch
Spring, Helical, Magazine Catch
Catch, Magazine
Buttstock Assy
Magazine (7x)
I suggest attaching them all to a spare lower, so they don't get lost or misplaced. And, maybe some form of optical sight and/or rear BIUS.