Spacer – Machined Delrin. 2-1⁄8" (5.4cm) long. Fits buffer tube for standard, fixed A1/A2-style AR-15/M16 buttstock.
AR-15, Issue:08, Page:007
Big Book Catalog, Issue:65, Page:007
Law Enforcement / Police Store, Issue:08, Page:003
New Product Supplement, Issue:602, Page:028