As promised, individual parts weights:
Total Calculated...........80.13
Part ..........................Weight
...................................oz
Lower Half .................26.05
Lower .........................8.60
Trigger ........................1.30
Hammer .....................1.24
Pistol Grip ...................2.40
Mag Catch ..................0.40
Bolt Catch ...................0.46
Bolt Retainer ...............0.09
Safety/Selector ...........0.63
Pivot Pin ......................0.31
Takedown Pin ..............0.23
Buffer Tube .................3.40
Buffer .........................1.58
Buffer Spring ...............2.20
A2 Spacer ...................0.81
A2 Screw ....................0.22
Buttplate .....................1.76
Trigger Guard ..............0.18
Grip Screw ..................0.24
Part ..........................Weight
....................................oz
Upper Half ..................54.08
Upper ..........................5.96
Gas Block ....................1.48
Gas Tube .....................0.80
Barrel ........................24.80
Charging Handle ...........1.04
BCG ..........................11.60
Handguard ...................6.30
Muzzle Device ..............2.10
As you can see, the total is pretty close to the actual weighed part. 80.13oz separately, 80.5oz when weighed assembled. It could be rounding errors, or I forgot a part.
Next will be a list of parts used and prices.
Total Calculated...........80.13
Part ..........................Weight
...................................oz
Lower Half .................26.05
Lower .........................8.60
Trigger ........................1.30
Hammer .....................1.24
Pistol Grip ...................2.40
Mag Catch ..................0.40
Bolt Catch ...................0.46
Bolt Retainer ...............0.09
Safety/Selector ...........0.63
Pivot Pin ......................0.31
Takedown Pin ..............0.23
Buffer Tube .................3.40
Buffer .........................1.58
Buffer Spring ...............2.20
A2 Spacer ...................0.81
A2 Screw ....................0.22
Buttplate .....................1.76
Trigger Guard ..............0.18
Grip Screw ..................0.24
Part ..........................Weight
....................................oz
Upper Half ..................54.08
Upper ..........................5.96
Gas Block ....................1.48
Gas Tube .....................0.80
Barrel ........................24.80
Charging Handle ...........1.04
BCG ..........................11.60
Handguard ...................6.30
Muzzle Device ..............2.10
As you can see, the total is pretty close to the actual weighed part. 80.13oz separately, 80.5oz when weighed assembled. It could be rounding errors, or I forgot a part.
Next will be a list of parts used and prices.