I got this from a small shop and was told that it is from Hasbro which I am not sure... anyway, it is a fun project for adding details and make this 1/6 vest looks more realistic. The first 2 pic's shows the original - the flaps for the individual 40mm ammo pockets were only loops sewed on the pockets, and the adjustable strap on the back was wrong in size and I believe the position was wrong too. The color of the flaps and back strap are also wrong.

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After I compared it with the pic's from several reference books, I removed all the flaps and the back strap. Then nylon straps was added to the pockets' bottom. Made 24 new flaps with buttons and also add 3 buttons to the vest.  The 40mm grenades are resin cast cut from the 21st 40mm ammo link.  I originally intended to make the pockets functional but couldn't found small workable buckles, so I fixed all the flaps in the meantime. Click on the picture to see the finished vest.