Hi Timothy and welcome. It is the carbine with the "Pro Pack Kit". The Pro Pack Comes with a stock mounted dual mag carrier that attaches through the buttstock and also has 2 extra mags. Cheers and stay safe!

Hi-Point® Firearms 45ACP Carbine Specifications:
Weight: 7 lbs.
Barrel length: 17.5"
Capacity: 9-shot magazine standard
Overall length: 32"
Sights: Fully-adjustable
Stock: All-weather, black or hydro-dipped molded polymer depending on model
All Hi-Point® Firearms 45ACP carbines are +P rated to accept all factory ammunition and feature:
Threaded .578 x 28 barrel standard
Thumb magazine release
All-weather, polymer skeletonized stock
100% American-made parts and assembly
FREE trigger lock, sling and swivels
9-round magazine (interchangeable with JHP45 handgun)
Internal recoil buffer in stock
Manual thumb safety
Picatinny rails
Last round lock open
Fully adjustable sights (rear peep & post front)