The Taylor Freelance Seattle Slug grip plug is a solid brass backstrap plug that improves the balance of the Glock 17/22 pistol. The Seattle Slug is easy to install with one simple screw that uses the factory lanyard hole. With the increased weight of the frame, felt recoil is reduced and follow up shots become faster. The Slug also protrudes from the pistol and is contoured to act as a low profile magazine funnel speeding up reloads. This model only fits Gen 3 or earlier Glock pistols and will not fit Gen 4. 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.