Just been issued the new haversack for the GSR, so thought I'd let you know what your in for. Please note I have only been issued the Haversack and not the actual GSR yet. At first notice this new haversack is a lot bigger than the one for the S10 (but then the GSR is a bigger respirator. As well as the main pouch there as 2 side pouch's that are attached with Molle straps (what reason these would be removed for I don't know) and both have 3 pockets for where your combo pens would go. They also have longer strips of Velcro than what is necessary to close the flap shut. Inside the main pouch on the back there are 6 poppers and an elastic strap- these are to hold the GSR's holder (issued with the mask) in place- from what the Ships Q told us it took him about 5 minuets to attach this holder in place and from sight it took up quite a lot of actual space in the bag. There are also 2 pockets inside for the stowage of canisters. The front of the pouch is fastened with a Velcro and 2 poppers are fitted on the lid flap and 3 on the main body. Under the flap in the main body is 2 zips that allow the pouch to be expanded allowing the mask to be fitted inside before zipping up to allow for a snug fit meaning that the mask won't rock about inside. As visible from the photos the bag can be carried with the shoulder strap (which can be unclipped completely) or could be attached to webbing, there is what also appears to be a leg strap at the bottom of the bag also- possibly to reduce the bag from lunching off the thigh when running. As stated this is the Army's version, apparently the Navy are to be issued a bigger haversack than this due to us carrying more kit in our haversacks. Any questions please ask and I'll be happy to answer them.