KNS Precision Compact AR/MCX Stock Adapter

The KNS Precision Compact AR/MCX Stock Adapter (KNS Precision part no. Compact AR-MCX Adapter with Flange) lets a Picatinny-style stock or brace, such as a SIG MPX folding stock or an SB Tactical FS1913 brace, mount in place of a standard AR-15 buffer tube. KNS Precision built the Compact version without the extra rail length of their standard AR/MCX adapter, since many rifles that use the AR-15 buffer tube attachment point do not actually need the tube for an in-line buffer spring. The kit includes an externally threaded adapter plug that fits into the buffer socket, a rail section that mates to it, and a hex-socket bolt with lock washer to secure the assembly. It is a purpose-built solution for builders who want to attach a Picatinny-interface stock or brace without carrying the extra length of a full buffer tube.

Key Specifications

• Adapts a Picatinny-style stock or brace to mount without a standard buffer tube.
• Compatible with braces and stocks such as the SIG MPX folding stock or SB Tactical FS1913.
• Includes an externally threaded adapter plug that fits the buffer socket.
• Includes a rail section that mates to the adapter plug.
• Comes with a hex-socket bolt and lock washer to secure the assembly.
• Built in the Compact configuration, without extra rail length.

Frequently Asked Questions

What does this adapter let me attach? A Picatinny-style stock or brace, such as an SB Tactical FS1913 or SIG MPX folding stock.

What does the kit include? An adapter plug, a rail section, and a hex-socket bolt with lock washer.

Buy the KNS Precision Compact AR/MCX Stock Adapter

Mount a Picatinny-interface stock or brace without the extra length of a full buffer tube. See more from KNS Precision or shop our full rifle parts selection. Order it from our Lubbock, Texas gun shop for fast, insured shipping.