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.