This product was discontinued March 2021. It is still supported but we are not accepting new orders.

AR-15 upper designed for use with 556 TAKE DOWN
Built specifically for mil-spec ammo and our 556 TAKE DOWN

This upper has been specified and put together specifically to run our 556 TAKE DOWN suppressor with minimal blowback and to run reliably in a dedicated suppressed fashion with mil-spec ammunition. This upper was designed to meter at about 140 dB at the shooter's ear and at the mil-spec muzzle position.

Please refer to the 556 TAKE DOWN product page for its specifications.

It is available as either an SBR upper or we can permanently pin the 556 TAKE DOWN to the barrel to prevent the requirement of a registered SBR lower. With the front-serviceability of the 556 TAKE DOWN, this combination can still easily be maintained and repaired.

The DSU is available with either the Aero M-LOK float tube, or the hybrid version with Picatinny rails at the front. For mounting flashlights, etc, at the front, the Picatinny version is recommended as the M-LOK backers will most likely contact the suppressor.

An H4 buffer is recommended for compatibility with all ammo types.

Special Features

10.3" Ballistic Advantage barrel, 4150 Chrome Moly, with custom gas port
QPQ/melonite barrel coating
Aero Precision (black nitride) BCG
Aero Precision upper receiver
Radian Raptor charging handle
1:7 twist


Calibers 5,56mm NATO
MIL-SPEC ammunition is specified, IE, full-power 5.56 mm
including the following optimized for suppression performance: MK318 (Federal T556TNB1), Hornady 75gr TAP SBR, Hornady 75gr Interlock SBR Black
Barrel 10.3"
Overall Length 24 inches incl. suppressor
Rail Options AERO M-LOK,
AERO hybrid quad-rail / Picatinny
Suppressor 556 TAKE DOWN
Weight 5.5 lbs total
Use SBR, full-auto
Price $1595
$1100 (upper only)
Warranty TBAC Limited Lifetime Warranty
How to order a suppressor