Designed in conjunction with maxim defense, the sbpdw pistol stabilizing brace is 3-position adjustable and compatible with mil-spec bolt carrier groups and carbine buffers.It features a qd attachment point and a nylon strap.This model has a black finish.*note- not compatible with freedom ordnance fx-9 lowers or sig m400/516 lowers with integral qd sockets.Finish: BlackType: BraceModel: AR BraceDimensions: 6.75"-9.37" LMaterial: Elasto-Polymer