If you are looking for replacement O Rings for the takedown lever on your P320 pistol, simply check my Sig P320 page and link to Ebay. Search for "Sig Sauer P320 O Rings" and you will find them available in 5 and 10 packs. If you are into maintenance and regularly field strip your P320 (all models), have a few extras on hand! These rings are the correct Buna-N material and the right size. This is a much better alternative to buying a full O ring kit at the hardware store or factory. Check my listings under Malibru79 on Ebay!