Airsoft Forums UK

The small ones are .209 primers and you can use em in impact or timed grenades.

My preference is timed and recently got one of these:

https://www.defconairsoft.co.uk/product/dynatex-timed-delay-grenade-bfg/

Or look up 'BFG grenade' to see what else is available.

The 9mm can also be used in certain grenades but harder to find compatible grenades for those.

The 12guage blank is not used anymore cos they're too loud.  You might be able to pick up a second hand SWAT VTG that takes em but you won't be able to use it in a game.

Do you currently have a bfg of any kind? 

@EDcase Thanks very much for that explanation! Is it worth getting a 9mm Nade at all? Or best to stick with something that will take the .209 primers? 

@heroshark In my almost 3 years of playing I haven't thrown a grenade of any sort. 

My favorites have always been original dyno or swat timed. Only buy a swat if it's there in front of you they have terrible service by all accounts. Timed is more versatile and those models take 12g all the way to .22 with adaptors. Staffordshire militaria had some in.