Hi Karsten,this post has fractured off two topic's,(Mobile Internet submitted the same thing twice
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The one pictured has a floor space of 8.5cm by 8.8cm.It will fit most small field gun's,from both war's.There's a set to go with this one which will change the way you game with fixed gun's(not allowed to say any more )Your going to love it!.I've been using it for a while.Its great fun when you use it on someone else,not so much when they do it to you.