The 870 with wood furniture and 7+1 rounds 2 3/4" 00 Buck: 8.9 lb.
With Magpul furniture and 7+1 rounds: 8.8 lb.
Removing the extended magazine tube with 4+1 rounds: 8.0 lb. Half of the weight reduction is the magazine tube itself!
With Magpul furniture and 7+1 rounds: 8.8 lb.
Removing the extended magazine tube with 4+1 rounds: 8.0 lb. Half of the weight reduction is the magazine tube itself!