Roni Micro Roni Gen 4X Pistol Conversion Kit for Glock 19X/22/23/25/31/32/45 w/Brace Flat Dark Earth 0. 4X with arm support combines enhanced ergonomics with added stability for controlled firing. Built on the Gen. 4X conversion kit it features a reinforced structure optic-ready top rail and modular design while remaining compact lightweight and easy to handle. Specifications for Roni Micro Roni Gen 4X Pistol Conversion Kit for Glock w/ Brace: Manufacturer: Roni Gun Make: Glock Gun Model: Glock 25 Glock 19X Glock 45 Glock 22 Glock 17 Glock 32 Glock 31 Glock 23 Glock 19 Package Contents: Roni Micro Roni Gen 4X Pistol Conversion Kit for Glock w/ Brace What firearm models does the manufacturer say Roni Micro Roni Gen 4X Pistol Conversion Kit for Glock w/ Brace is compatible with? The manufacturer says that Roni Micro Roni Gen 4X Pistol Conversion Kit for Glock w/ Brace is compatible with Glock 19 Glock 23 Glock 31 Glock 32 Glock 17 Glock 22 Glock 45 Glock 19X Glock 25Roni MR4X-G1719-STAB-FDE: Micro Roni Gen 4X Pistol Conversion Kit for Glock 17/19/19X/22/23/25/31/32/45 w/Brace Flat Dark Earth