looks like an MBC model.. 2 part as opposed to a single piece construction of a JGA..
good gun, i own one, tho a few years older... the MBC where the pricier of those 2 models when they where the leading sellers... the JGA makes an awesome pressure-fed gun, whereas the MBC is inclined to work better with its syphon system......
45 cap is a good all-around cap.. decent for basecoats, single stage and clear....many will use an 80 cap for single stages and clears, but the 45 will work ok...