ERGO AR AccuWedge. These AR15 Lower Parts by ERGO are incredibly useful for reducing the amount of movement between the upper and lower receiver on an AR-15 platform rifle. This ERGO AR AccuWedge Piece fits between your upper and lower receiver to reduce the play. Plus these AR15 Parts are large enough that you can trim them to fit your specific needs. These ERGO AR AccuWedge Pieces are a must-have for any build but they're also an easy DIY project that helps you create a more personalized weapon shooting experience. Get your ERGO AR AccuWedge Pieces today to increase the precision of your build. Specifications for ERGO AR AccuWedges: Manufacturer: ERGO Gun Model: AR-10 AR-15 Color: Red Condition: New Quantity: 3 Features of ERGO AR AccuWedges: Useful for reducing the amount of movement between the upper and lower receiver on an AR-15 Large enough so you can trim to fit Package Contents: ERGO AR AccuWedges What firearm models does the manufacturer say ERGO AR AccuWedges is compatible with? The manufacturer suggests that ERGO AR AccuWedges is compatible with AR-15 AR-10ERGO 4988-3PK: AR AccuWedge