You can't buy a 20 ga Maverick 88. The 88 is only made in 12 ga. They have a deer model, security model and a field model. You can get Mossberg 500 in a 20 ga. I usually shoot 100 rounds a every weekend through my 20 ga Mossberg 500, without a malfunction.
I just sold a 20ga maverick. Mossberg sends us at least 7 a month.