In this Build Box Bonus, Chris Cerino walks through a common AR build challenge - installing the magazine catch correctly. This Build Box Bonus is brought to you by Brownells.

Build Box is the ultimate competitive gun-building show. Each week, contestants will be challenged to compete with each other, the clock, and themselves, while winning over the judges in a pressure-packed environment. From subsonic adaptations and competition conversions to pistol perfection and modern hunting rifles, Build Box is the ultimate test in gun-build mastery.

More information on Build Box here: buildboxtv.com

Catch Build Box on Outdoor Channel, Wednesday 7:30 PM EST, Wednesday 10:30 PM EST, Thursday 4:30 AM EST, and Tuesday 3:30 PM EST.

Build Box is supported by some of the finest brands in the firearms industry, including: Aero Precision, Ballistic Advantage, Blue Force Gear, Brownells, DoubleStar, Holosun, Lone Wolf, Real Avid, Timney Triggers and Wheeler.

Additional product support from: Ammunition Depot, Black Hills Ammunition, Bushnell, ERGO Grips, Faxon Firearms, Leupold, Luth-AR, Magpul, SB Tactical, Vortex Optics and XS Sights.

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