Slide Fire Solutions Collapsible Bumpstock Black. With the fit and finish of the SSAR-15 MOD you can t go wrong. The MOD has a 6 position adjustable stock QD mounts santoprene overmold on the butt pad as well as the pistol grip. The bump fire switch has been relocated to the bottom of the pistol grip. Just turn it and UNLEASH THE FREEDOM Did we mention it is ambidextrous One last thing when you're in the semi auto function for precision shooting adjust the friction roller at the buffer tube to shore up the tolerance. Your AR-15 will require a MILSPEC Buffer tube for this model. INTERFACE BLOCK INCLUDED. Remember be safe be kind and have fun Specifications for Slide Fire Solutions SSAR-15-MOD Collapsible Bumpstock: Manufacturer: Slide Fire Solutions Color: Black Gun Model: AR-15 Stock/Brace Material: Polymer Gun Make: AR Platform Gun Type: Rifle Features of Slide Fire Solutions SSAR-15-MOD Collapsible Bumpstock: Collapsable 6 position stock ambidextrous for AR15 Style Rifles with Milspec buffer tubes. Allows the shooter to transition from bump fire to standard fire with lock switch located at the bottom of the pistol grip. Package Contents: Slide Fire Solutions SSAR-15-MOD Collapsible Bumpstock What firearm models does the manufacturer say Slide Fire Solutions SSAR-15-MOD Collapsible Bumpstock is compatible with? The manufacturer suggests that Slide Fire Solutions SSAR-15-MOD Collapsible Bumpstock is compatible with AR-15Slide Fire Solutions SSAR-15-MOD: SSAR-15-MOD Collapsible Bumpstock Black