Like most conversion kits out there, this consists of a Picatinny rail upper for different attachments. If precedence mail is chosen and also your buy includes this merchandise your shipping and delivery method will be altered to UPS Ground & additional shipping and delivery expenses can be applied. Most returns https://sageebr08518.uzblog.net/new-step-by-step-map-for-b-t-stock-conversion-kit-41201909