Wilson Combat Spring, Firing Pin, AR9, 9mm Out of stock. Check back later... Price: $3.95 Notify me when this item is back in stock (log in required) Description Details Reviews Shipping info UPC: 811826029027Manufacturer: Wilson CombatModel: TR-AR9FPSCategory: PartsOtherMisc AR-15 PartsStock: 0Unit/Measure: EACH This item may be shipped directly to your home address, unless you live in a restricted state.