The Sig Sauer SIGM400 Pro SBR (brand part no. WRM400-556N-11B-PRO-SBR) is sets the standard for direct-impingement AR-15 platforms, built accurate, lightweight, and from the finest components. Sig Sauer restricts this SIGM400 Pro configuration to first-responder purchasers only, under the manufacturer’s eligibility program.

Key Specifications

• Chambered in 5.56 NATO.
• Restricted to verified first-responder purchasers under Sig Sauer’s program.
• Built as a direct-impingement AR-15 platform.

Frequently Asked Questions

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

Who can purchase this firearm? Verified first responders only, per Sig Sauer’s manufacturer eligibility program.

Buy the Sig Sauer SIGM400 Pro SBR (First Responder Exclusive)

This SBR is a Title II item regulated under the National Firearms Act and is restricted to verified first-responder purchasers under the manufacturer’s program. 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. Contact our Lubbock, Texas gun shop to verify eligibility and start the transfer process through Sig Sauer‘s short barrel rifles lineup.