The S10 respirator used by the British Army was a very good design for its day and served well for many years, and indeed is still serving for many. It was not without its problems however and in 2010 a new and radically different design of respirator was introduced and slowly rolled out to troops. The new respirator was titled the ‘GSR’ or ‘General Service Respirator’ and is one of the most advanced designs issued to soldiers anywhere in the world:Compared to its predecessor the GSR was designed to allow troops to wear it for a maximum of 24 hours rather than the 4 hours of the S10. It also has a single full face visor rather than individual eyepieces for better visibility and to make it less claustrophobic and most importantly of all, twin filters to allow them to be more easily changed in a CBRN environment. Each filter is a small lozenge shape:These fit either side of the mask with a locking system:The filters can be turned upwards to allow the wearer to use optics and weapons, and as the mask works on one canister and has automatic valves the user can keep breathing normally whilst changing canisters- a marked improvement over other designs. The front of the mask has a removable cover allowing access to the speech diaphragm:The mask is much easier to breathe through than the S10, as proved by the world record London marathon time for running in a respirator achieved by Lance Corporal Andy McMahon who took 3 hours and 28 minutes to complete it wearing a GSR and canisters. He remarked I am very impressed with the new GSR: compared to the old respirator it is almost as if you are running without one. No doubt he found the long straw built in to allow the user to drink from a water bottle very helpful on his run:A set of adjustable straps allow the mask to be fitted to the individual carefully:These have locking bars to ensure the mask doesn’t become loose over time. The face seal of the mask is made from a soft comfortable rubber and the drinking straw protrudes into the main mask, tucking out the way when not in use:Each mask comes with a card history sheet so the user can record what has been done to it, settings etc. This just slots in a plastic wallet and is carried in the haversack:The following diagram comes from the CBRN aide-memoire and helpfully shows all the features of the GSR:One of those involved in the trials process made the following observations:
We are just starting conversion to GSR, feed back is generally pretty good. There has been a lot of work over the last two years to get the GSR fit for service. I think the non deforming visor is a bit of a mangling of the need for the former in the haversack. In order for the system to work the GSR needs to be kept in good shape, hence the former. Pros: Breathing resistance is much lower, easier dills due to twin canister set, better visibility and less isolation. Not been on the ranges, but it should be better. Cons: its a bit front heavy, but you get used to it and the first generation haversack is huge. However there is a new one on its way in MTP.
The British Army ordered 309,228 masks from the manufacturer’s Scott Safety, the last being delivered in 2015. The mask was well received with Air Commodore Andy hall remarking: The GSR is a superb piece of equipment, offering unprecedented levels of protection as well as being practical and, so far as is possible for a respirator, comfortable.