The G&G MK2 dummy hand grenade is a non-explosive, realistic replica designed for airsoft use and re-enactment kits that also functions as a BB container/speed loader. 
 
 
Product Details
Functionality: This is a non-functioning replica, ideal as a prop for Milsim/Impression kits. Its primary practical use in airsoft is as a BB container that can store over 500-800 6mm BBs, allowing for quick reloading of magazines.
Construction: It is made from a high-strength polymer/plastic and aluminum, making it durable and lightweight. Some third-party replicas might feature a hard rubber body with a metal handle.
Design: The replica has a realistic appearance with a functional pull pin, mimicking the iconic "pineapple" texture of the original MK2 grenade. The top unscrews to access the BB storage compartment.
Dimensions/Weight: The product dimensions are listed as 110 x 50mm, with a weight of approximately 90-100 grams.