Lockstep Arms Lancer L5AWM Base Plate Plus 5 Purple 5. This is an enlarged base plate with textured sides and increased weight to help improve your reload times. Increases magazine capacity by 5 rounds. Toolless install and removal for easy mag servicing. Specifications for Lockstep Arms Lancer L5AWM Base Plate w/5 Base Plate: Manufacturer: Lockstep Arms Finish: Anodized Fabric/Material: 6061-T6 Aluminum Magazine Capacity: 5 Round Gun Make: AR Platform Gun Model: AR-15 Package Contents: Lockstep Arms Lancer L5AWM Base Plate w/5 Base Plate What firearm models does the manufacturer say Lockstep Arms Lancer L5AWM Base Plate w/5 Base Plate is compatible with? The manufacturer says that Lockstep Arms Lancer L5AWM Base Plate w/5 Base Plate is compatible with AR-15Lockstep Arms LA-AR15-112-PUR: Lancer L5AWM Base Plate Plus 5 Purple