yes it include interchangeable backstraps see ******
Glock 33 Gen4 Specifications
Brand: Glock
Category: Pistols
Series: Gen4 Subcompact
Caliber: 357 Sig
Model: G33
Capacity: 9+1
Action: DAO
Frame Finish: Black
OAL: 6.42"
Frame Material: Polymer
Hand: Right
Sight Style: Fixed
Slide Finish: Matte Black
Slide Material: Steel
Slide Description: Serrated Steel
Gun Platform: Glock Component Compatible Style
Magazine Type: OEM
Grips: Black Finger Grooved Rough Texture Polymer
Sight Configuration: Fixed
Includes: Mag Loader / 3 Mags / Cleaning Set / Pistol Case /******** Backstrap Set / Cable Lock
Safety: Trigger, Firing Pin, Drop
Barrel Description: 3.43" Cold Hammer Forged
Barrel Length: 3.43"
Max Capacity: 9
Weight: 25.93 oz
Frame Description: Black Polymer

Hi and welcome. Yes Sir. Cheers and stay safe! https://deadcrowdefense.com/glock-g33-gen4-subcompact-357-sig/#:~:text=Firearm%20is%20pristine.-,Comes%20with%20(pictured)%20Original%20Packaging%2C%203%20mags%2C%20interchangable,in%20a%20user%2Dfriendly%20subcompact.