New for 2016, the SI JitterPlug is a drop-in component that installs in a stock polymer guide rod for compact and full-size compatible GLOCK. Installed between the guide rod and the front of the lower locking lugs, the SI-GJP increases spring tension on the barrel and slide, improving lockup feel and removing that annoying GLOCK barrel rattle. Specifications for Strike Industries Jitter Plug for Glock: Manufacturer: Strike Industries Color: Silver Fabric/Material: Stainless Steel Gun Make: Glock Gun Model: Glock 22, Glock 17, Glock 38, Glock 37, Glock 32, Glock 31, Glock 23, Glock 19 Quantity: 1 Features of Strike Industries Jitter Plug for Glock Stainless steel construction Tightens lockup of barrel and slide, potentially increasing shot repeatability. Improves feel of action Easy installation and removal Package Contents: Strike Industries Jitter Plug for Glock JitterPlug for GLOCK X1 Which weapon models is Strike Industries Jitter Plug for Glock compatible with? Strike Industries Jitter Plug for Glock is compatible with Glock 19, Glock 23, Glock 31, Glock 32, Glock 37, Glock 38, Glock 17, Glock 22