This factory OEM magazine for the Glock G21 Gen 5 is designed for reliable feeding and rugged durability in .45 ACP. It holds 13 rounds and is constructed from black polymer with a high-visibility orange follower for quick empty-mag identification. Engineered to Glock's exacting standards it's a trusted option for both carry and training use.Glock G21 Gen 5 .45 ACP OEM Magazine - 13 Round (Black Polymer)Factory original construction for reliable fit and functionDurable black polymer bodyHigh-visibility orange follower13-round capacityWhether you're stocking up for the range or looking for a dependable spare for your carry setup this magazine delivers Glock's legendary performance. Built to handle heavy use with consistent cycling it's the perfect match for your Gen 5 G21. A true OEM part that keeps your .45 ACP running strong.Looking for even more magazines? Browse our Glock Magazines selection!Stock up on affordable 45 ACP ammo!