The Sig Sauer MCX Spear (brand part no. RSPEAR-68-13B-NG-SBR) is a 6.8X51 short-barreled rifle, pairing a 13-inch barrel and a 1:7 twist rate for a compact, maneuverable platform. Sig Sauer builds the MCX Spear with a 20+1-Round-round capacity, a ambidextrous lever. The MCX Spear favors shooters who want a compact, NFA-registered SBR platform.

Key Specifications

• Chambered in 6.8X51 for compact SBR performance.
• Wears a 13-inch barrel for a compact SBR profile.
• Cut with a 1:7 twist rate.
• Feeds from a 20+1-Round-round capacity configuration.
• Equipped with a Ambidextrous Lever.
• Operates as a Semi-Auto action.
• Includes 1 x 20-Round magazine.
• Equipped with No Sights / Optics Ready.

Frequently Asked Questions

Is this an NFA item? Yes. As a short-barreled rifle (SBR), it's a Title II firearm requiring an approved ATF Form 4 and transfer through an NFA-licensed dealer.

What caliber does it fire? 6.8X51.

How long is the barrel? 13 inches.

Buy the Sig Sauer MCX Spear SBR

This is a Title II item regulated under the National Firearms Act. Purchase requires an approved ATF Form 4, no federal transfer tax and transfer through a licensed NFA (SOT/Class 3) dealer, with an extended federal approval wait before delivery. Order through Sig Sauer‘s short barrel rifles lineup and our Lubbock, Texas team will walk you through the transfer process.