Poly lower saves a pound

[Jkinpa1]

Here is an interesting Excel spreadsheet for anyone interested, I stumbled on it doing a search for weights for a recent Colt 653 clone build, its pretty thorough

AR15 Parts Weights Database:

https://docs.google.com/spreadsheets...#gid=102399689

Did you create this? Can you explain it a little, or maybe direct to an orig posting?
I think it’s really interesting, just not sure of a few things...

[SgtRecon]

Did you create this? Can you explain it a little, or maybe direct to an orig posting?
I think it’s really interesting, just not sure of a few things...

I did not create it, I found it googling the weight difference between A1 & A2 uppers ( and C7 upper), the original link I posted was the upper tab (different parts and groups can be selected along the bottom toolbar) , suppressors have been added since I last checked. to answer the previous question from Empty Mag the M & U weights are Maker and User, maker being as shipped with packaging materials, kind of useless info? , user is as assembled weight, here is the link to the first page with explanations and source info

https://docs.google.com/spreadsheets...gid=2033901686

[Jkinpa1]

Thank you, appreciate it.

[Bang]

Shot about 50 rounds with the polymer lower today. Zeroed a red dot and pretty consistently hit steel at 200 yards with it. Very happy with the combo. I like the trigger that came on the New Frontier lower better than the one on my DPMS lower. Ammo was Brown Bear. The barrel twist measures 1:8-1/2.