Dark Storm Industries Ambidextrous Magazine Release and Spring Kit Black. This set includes all necessary components for reliable mag changes whether you're building from scratch or refreshing an existing lower: Ambi Magazine Release Catch Magazine Release Spring and Magazine Release Button. Specifications for Dark Storm Industries Ambidextrous Magazine Release and Spring Kit: Manufacturer: Dark Storm Industries Gun Make: AR Platform Gun Model: AR-15 Color: Black Gun Type: Rifle Hand: Ambidextrous Features of Dark Storm Industries Ambidextrous Magazine Release and Spring Kit Mil-Spec Dimensions for Universal Fit Package Contents: Dark Storm Industries Ambidextrous Magazine Release and Spring Kit What firearm models does the manufacturer say Dark Storm Industries Ambidextrous Magazine Release and Spring Kit is compatible with? The manufacturer says that Dark Storm Industries Ambidextrous Magazine Release and Spring Kit is compatible with AR-15Dark Storm Industries DSI-LWR-MAGREL-AMBI: Ambidextrous Magazine Release and Spring Kit Black