Bolt Carrier Group (BCG) Comparison - Lightweight (Low-mass) vs Civilian vs Mil-Spec

I did mis-speak and the BCG in the video is of the "civilian" variety. I have all three pictured here: / bel57aexrs5 and the weights are:
Lightweight: 8.45 oz
Civilian: 11.10 oz
Mil-Spec: 11.30 oz
The difference between the Civilian and Mil-Spec BCG's is .2 oz, or 5 grams. The Lightweight BCG is 33% lighter than the Mil-Spec BCG and 31% lighter than the Civilian BCG.
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