10-round magazine for BRX1 rifles.
BRX1 MAGAZINE CHART:
TYPE A: Magnum calibers (e.g. 300 Win Mag)
TYPE B: Standard calibers with long case (e.g. 30-06)
TYPE C: Standard calibers (e.g. 308 Win)
TYPE D: Standard calibers (e.g. 6.5 Creedmoor, 243 Winchster)