The combination displayed on Ein's kennel, "CPE1704TKS," is the same code used to launch nuclear missiles that the WOPR computer cracks in WarGames.
The rifle Spike uses circa 38:30 is a Ruger Precision® Rifle Bolt-Action Rifle, with its original folding stock as well as an added silencer. Depending on caliber and configuration, the MSRP is in the 1800-2400 dollar range as of 2021.