Magpul’s PMAG 10/30 was designed for users who reside in areas with magazine capacity restrictions but desire a standard 30-round magazine form. The PMAG 10/30 provides the same next-gen impact and crush resistance, constant curve geometry, and long-life stainless-steel spring to ensure smooth feeding. They’ve added a proprietary lock plate that reduces the maximum capacity to 10 rounds, and it’s permanently secured by an aluminum rivet. A lock plate tab that’s clearly marked for capacity is also included.