CMMG Firing Pin Retainer, M16 Available to order on-line. Ships in 5-14 days Price: $1.39 Description Details Reviews Shipping info UPC: 815835017341Manufacturer: CMMGModel: 55BA4C5Category: PartsOtherMisc AR-15 PartsStock: Ships in 5-14 business days.Unit/Measure: ea This item may be shipped directly to your home address, unless you live in a restricted state.