Hi Michael, this comes with (1) 10rd magazine. Your C9 magazines will not work, you would need this one budsgunshop.com/product_info.php/products_id/48316/hi-point+10+round+magazine+for+9mm+carbine ,
Stay safe & have a great day!

Hi Michael, unfortunately only (1) 10rd magazine provided. Additionally, it is not compatible with pistol magazine.

No, you can not.
The Hi-Point 9mm 995 Rifle Carbine is compatible with 10-round magazines. Here are some other Hi-Point magazines that are compatible with the Hi-Point 9mm Carbine:
Hi-Point CLP10C: A 10-round 9mm/380 compact magazine
Hi-Point Magazine Carbine 10mm: A 10-round black CLP1095 magazine
Hi-Point CLP9C: A 380/C9 .380 ACP/9mm steel magazine
Hi-Point CLP40P: A 10-round 0.40 S&W magazine
Magazine for Hi-Point Carbine .380 ACP 3895ts: A 10-round magazine
The pistol-style magazines for the Hi-Point .40 S&W carbine are interchangeable with the Hi-Point .40 S&W pistol. However, the original 995 carbine and the 9mm Hi-Point C-9 pistol are not completely interchangeable.

Hi Michael and welcome. (1) 10rd magazine. No, 9mm pistol and carbine magazines are different: budsgunshop.com/product_info.php/products_id/48316/hi-point+10+round+magazine+for+9mm+carbine