3200.00 Used Custom Rocky Mountain Rifles GRS Berserk 375 Ruger 22" 10rds w/3 Mags North Bay Mar 13, 2025 - 5:11 PM Oley’s Armoury Dealer Used Custom Rocky Mountain Rifles GRS Berserk 375 Ruger 22" 10rds w/3 Mags Follow link to website for more photos and details. Use coupon code "GUNPOST" to save $20 on shipping! Valid on used firearms only.