Simple, Fast Effective Protection against CBRN threats

Genuine Spare Oronasal for Avon FM12/ CT12 Gas Mask 

Sizes 1 & 2/3 available

Also this will fit onto the Avon S10.. See the last 4 images on this listing
NB ##Please note the location of the drinking straw is on the other side means you would need to hole punch a hole for the drinking straw to go through. So carefully doing this will make it possible to use the drinking function. ##

I have shown an s10 oronasal vs a fm12 one so you can see its the same size to mount in the respirator.

Sold each item individually

History on the FM12

The FM12 NBC Respirator is a military  produced by Avon Rubber and in service with the British Armed Forces and various police forces.

The main noticeable difference between the FM12 and the S10 is the ability of some FM12's to mount two filters to the mask simultaneously, as was done by the SBS in the Gulf War. When only one filter is fitted to a mask that has the ability to accept two, a blanking plug must be used.

The FM12 was introduced in 2000 as an intended replacement for the standard issue >>S10 NBC Respirator[1] in service from the 1980s. However, the FM12 was never widely adopted by the military as it was deemed too similar to the S10 to warrant total replacement of all existing S10s.

It was used, however, when an individual found that the S10 did not fit his face. They can occasionally be found on the surplus market but are considerably rarer than the S10.


The mask was designed around the S10, but has several design differences. The characteristics it shares in common with the S10 are the fail-safe drinking device, and the ability to accept corrective lenses on the inside of the eyepiece.

However, the voice emitter and exhale valve cover is smaller than that of the S10, as are the lenses. The FM12 has an overall lower profile than the S10 and sits closer to the wearer's face. The FM12's drinking tube is also longer than that of the S10, making drinking easier while wearing the mask. The FM12 also has an inner mask to prevent fogging of the lenses. The 'ridge' present around the edge of the S10 is absent from the FM12.


The harness of the FM12 consists of elastic strips, which connect to a mesh fabric piece on the back of the wearer's head. This change from the rubber straps of the S10 was designed to enable the mask to be worn for longer periods of time without discomfort, and also to hold the mask tighter to the face for a better seal.


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