I'd suggest calling first, as the limitations may be conditional, like pistol grip but 8 round mag and no muzzle devices, you'd be out a longdistance telephone call to a Cali Hi-Point Dealer, Check my post thers a link of Cali Dealers of Hi-Point
they sell a reduced capacity mag for areas that restrict mag count, If they allow AR's and AK's in CA shurely they must allow Hi-Points.
mabe adding a muzzle extension and recoil pad spacer to get past the length clause and reduced mag capacity.
I used to think the same thing about Hi-Points being crummy guns, I was given a 995 carbine that was blown up from firing reloads all I know is there was a ring of brass in the chamber and the extractor claw was missing, the factory said send it to them and they'd fix it and send it back, I mail'd the junker parcil post $14.73 and Hi-Point sent me back a like new gun with all the trimmings.......I only spent $14.73 to mail it, so basicly I had a 995 for the price of postage to send it to them, I dont matter if its blown up, drove over or been in a house fire, send them the remains and you get a new gun back
Ive had it for 6 years here in Northwest Arctic Alaska and wouldnt think of parting with it unless to trade up in caliber to Hi-Point in .45acp