This is a terrible picture of it but this is the 20 that I set up for my son to use. It is a Mossberg 500. It comes from the factory already drilled and tapped so there is no additional expense to get that done. The safety is on the tang so it is easily accessible. I replaced the stock with an ATI scorpion and installed a burris speed dot on it. I am currently using a Carlson's .575 and federal HW 7s. It will easily put 130-140 in a 10" circle at 40 yards. It carries like a dream, has very little recoil and I can adjust the stock for virtually anyone to use.

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