TacFire SSRK6.5CRDLPK20BN AR Rifle Build Kit With Lower Parts Kit Black Nitride. 5CRDLPK20BN AR Rifle Build Kit with Lower Parts Kit Black Nitride - The TacFire SS-RK6 6.5CRD rifle build kit contains- 20" 6.5 Creedmoor barrel NIB extension/nitride;...