SKU: AMLPIN308KPBK
UPC: 646809495113
MPN: PIN308KPBK
The AR MAG LOCK KingPin in black is a fixed magazine compliance pin built for AR-10 and .308 platforms. It serves shooters in restricted states who need a DOJ-compliant fixed magazine setup without giving up function at the range. This is the .308 version of the KingPin, engineered to work with Gen 4 AR MAG LOCK locking kits on DPMS style upper and lower units. If you're running a .308 build and need a legal way to keep the rifle in service under California rules, this pin handles that job while preserving fast reloads. Browse our full range of rifle parts for the rest of the build.
The KingPin replaces the rear takedown pin and works with DPMS style receivers that have a takedown hole diameter of .276 to .280 inches. It fits rear detent style lowers, not pistol grip detent style lowers, so check your receiver before ordering. A thumb-activated push opens the action for cleaning and reloading, and the pin automatically re-locks when the receivers are pushed back together. The design allows minimal separation of the upper and lower receivers for double feed clearing, and it stops the upper from swinging open during disassembly. It retains the bolt catch, holds the bolt back on the last round, and leaves the safety selector clear. Magazine changes run close to OEM mag release speed, and the unit comes off the receiver easily. Covered under US Patent 10,126,078.
Anyone building or maintaining an AR-10 in a state with magazine capacity restrictions will get the most out of this pin. It turns a standard .308 lower into a fixed magazine configuration that stays compliant while clearing double feeds and dropping the bolt on an empty mag. Install it alongside a quality lower build and you keep the rifle functional without constant magazine fumbling. Pair it with the right takedown pins and bolt catch hardware for a clean install. The black anodized finish matches most receiver sets out of the box.
This KingPin is built for AR-10 and .308 platforms using DPMS style upper and lower units. The receiver needs a takedown hole diameter between .276 and .280 inches, and the lower must be a rear detent style rather than a pistol grip detent style.
Yes. The .308 KingPin is designed to work with Gen 4 AR MAG LOCK locking kits. Confirm your kit generation and receiver detent style before installing to make sure everything mates up correctly.
Per manufacturer specifications, the KingPin is California legal and DOJ compliant. It creates a fixed magazine configuration and is covered under US Patent 10,126,078. Always verify current regulations in your jurisdiction before relying on any compliance component.
Yes. The KingPin allows minimal separation of the upper and lower receivers, which gives you access to clear double feeds. A thumb-activated push opens the action, and it re-locks automatically when the receivers are pushed back together.
It does. The design retains the bolt catch and keeps the bolt hold back on the last round. The safety selector also stays clear, and magazine changes run at speeds comparable to a standard OEM mag release button.
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