u can get it after youve returned frm the spire. if Ты killed giles, it wnt be so easy. but if u helped giles get rid of ripper and his gang, u will notice a big change n brightwood farm. after Ты do 1 last mission for giles, he will reward Ты with the key to his cellar. thn just follow ur dog and fight ur way thru afew hollowmen and ur dog will lead u 2 where the weapon is buried.
Ты should do the quest Cold Comfort Farmer before going to the Spire. Once Ты return Ты should do the quest Blind Date. After finishing Blind Date, buy the farm house and Переместить in. Remove the key to the cellar from the closet on the секунда floor and then rent the property out. The weapon will not appear if Ты are living there. Далее go into the cellar that Ты find in the сарай of the farm. Your dog will lead Ты to the Dig Spot where Ты will find the Enforcer rifle.