The X-Grip Magazine Adapter allows shooters to use full size magazines (full capacity or restricted) in compact or sub-compact pistol frames. Adapter slides down magazine and creates a flush fit when magazine is fully seated. Made from high impact polymer for light weight and durability.NoteDesigned for Glock Generation 3 and 4. Not compatible with other generation Glocks. DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.