Mesa,
The 2400 was a good comb gun and was much lighter than the later Valmet 412s. I had two of the 12/308 2400 along the way and sold my last one to raise $$ for a Valmet system. I actually wish I had kept the 2400; it was much faster handling and easier carrying. I never did get to try one in 222, but I heard they were tack drivers. This series uses the Sako dovetail mount system.