- BUILD OF THE MONTH ● SEPTEMBER 2026
AT3 “Black and Tan” 13.7″ 5.56 Home Defense AR Pistol
Built for compact handling and practical defensive use, this 13.7-inch 5.56 AR pistol combines premium ambidextrous controls, a flexible 1x/3x SIG SAUER optic package, and mission-ready lighting, sling, and magazine accessories.
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About the build
The “Black and Tan” is a compact 5.56 NATO AR pistol built around a Ballistic Advantage 13.7-inch barrel, Wilson Combat forged upper, and AT3 12-inch SPEAR M-LOK handguard. A Dead Air Keymount Micro Brake, Faxon lightweight bolt carrier group, and Radian Raptor charging handle complete a fast-handling upper with premium operating components.See Full Specs
The AT3 AT-15 lower adds an AT3 two-stage flat trigger, Radian Talon ambidextrous safety, FAB Defense grip, and SBA3X pistol brace. An Odin Works adjustable buffer, AT3 flat-wire spring, and Timber Creek QD end plate round out the lower with a tunable recoil system and practical sling support.
A SIG SAUER ROMEO5 Gen II and JULIET3 magnifier provide quick 1x aiming with an immediate 3x option. The package is completed with a Streamlight ProTac Railmount 2L, Edgar Sherman Design sling, two Magpul PMAGs, and a MAGLINK coupler.
Upper Receiver Parts
The upper starts with a Wilson Combat forged receiver and Ballistic Advantage 13.7-inch 5.56 NATO barrel under an AT3 12-inch SPEAR M-LOK handguard. A Dead Air Keymount Micro Brake completes the muzzle, while a Faxon lightweight bolt carrier group and Radian Raptor ambidextrous charging handle handle the operating controls. An AT3 low-profile gas block, mid-length gas tube, Strike Industries dust cover, and FDE forward assist complete the assembly.
Lower Receiver Parts
The lower starts with an AT3 AT-15 forged receiver and adds an AT3 Pro-Builder lower parts kit, enhanced FDE trigger guard, and FAB Defense AG-43 grip. An AT3 4.5-pound two-stage flat trigger and Radian Talon ambidextrous safety provide the upgraded controls. The SBA3X pistol brace, Odin Works adjustable buffer, AT3 flat-wire spring, mil-spec buffer tube, and Timber Creek QD end plate complete the rear assembly.
ACCESSORIES
The sighting package pairs a SIG SAUER ROMEO5 Gen II red dot with a JULIET3 3X magnifier for quick transitions between close and intermediate distances. A Streamlight ProTac Railmount 2L and Edgar Sherman Design two-point sling add practical support equipment. Two Magpul 30-round PMAGs and a MAGLINK coupler complete the package.
