M2 Armament Group DIY Polymer80 PF940SS/G43/43x/48 Rail Set w/ Locking Block/ Rear Rail Module/ 2x Pins Black. Engineered specifically for the growing community of home gunsmiths 80percent builders and 3D printing enthusiasts (3DP / FMDA / Single-Stack CAD) this essential steel rail kit delivers the critical structural components required for smooth slide cycling rigid lockup and flawless frame function. Specifications for M2 Armament Group DIY Polymer80 PF940SS/G43/43x/48 Rail Set w/ Locking Block/ Rear Rail Module/ 2x Pins: Manufacturer: M2 Armament Group Color: Black Gun Model: Glock 48 Glock 43X Glock 43 Package Contents: M2 Armament Group DIY Polymer80 PF940SS/G43/43x/48 Rail Set w/ Locking Block/ Rear Rail Module/ 2x Pins What firearm models does the manufacturer say M2 Armament Group DIY Polymer80 PF940SS/G43/43x/48 Rail Set w/ Locking Block/ Rear Rail Module/ 2x Pins is compatible with? The manufacturer suggests that M2 Armament Group DIY Polymer80 PF940SS/G43/43x/48 Rail Set w/ Locking Block/ Rear Rail Module/ 2x Pins is compatible with Glock 43 Glock 43X Glock 48M2 Armament Group M2-SC-RAILS: DIY Polymer80 PF940SS/G43/43x/48 Rail Set w/ Locking Block/ Rear Rail Module/ 2x Pins Black