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18 oz empty then 4-5 oz for the ammo see *****Capacity7+1
Slide MaterialThrough-Hardened Alloy Steel
Barrel MaterialAlloy Steel
Barrel Length3.12"
Grip FrameBlack, High Performance, Glass-Filled Nylon

SightsIntegral
Slide FinishBlack Oxide
Barrel FinishBlack Oxide
Width1.21"
*******Weight18 oz.

Overall Length6"
Height4.50"
Grooves6
Twist1:10" RH

Gary, unloaded weight is 18 oz's and loaded with 8rds of 115gr Self defense ammunition, 21.72 oz's : Cheers and stay safe!

Weight is 18oz, full specs on Rugers website here
https://ruger.com/products/ec9s/specSheets/13211.html

This weights 18 Oz's or 1.125 pounds unloaded. Plus roughly another 4ozs for 8 rounds of 115 gr 9mm so 22 ozs loaded or 1.375 pounds. Hope this helps.