Known for their support of the precision rifle community and manufacturing the ULTRA series of suppressors, Thunder Beast Arms Corporation (TBAC) is announcing a new 556 Take Down rifle silencer. Designed for the SOCOM SURG Program – (Suppressor Upper Reciever Group) the new Take Down is a user serviceable suppressor for short barreled rifles. TBAC’s new model is also part of a soon to be announced AR15 dedicated suppressed upper receiver.

If you aren’t familiar with the SURG solicitation, SOCOM’s requirements gave manufacturers narrow guidelines to follow concerning overall build and rebuild costs, serviceability, firing schedules and sound reduction. The end result is a heavier build that can withstand heavy fire and a lower cost compared to titanium silencers.

At a sub $500 MSRP, the 556 Take Down should retail somewhere just above $400. Details below.

TBAC 556 Take down

Heavy-duty 5.56 Suppressor – Made specifically for .223/5.56 SBR’s and “one-stamp” uppers

The 556 TAKE DOWN was designed around the 2017 USSOCOM Suppressor Upper Receiver Group (SURG) solicication. It may be used as direct thread, semi-permanently installed, permanently installed, or purchased as part of our DEDICATED SUPPRESSED UPPER.

With a 10-inch barrel, the 556 TAKE DOWN was designed to meter at an average of 140 dB or less at both the mil-spec mic position and at the shooter’s ear with mil-spec Mk318 mod 0, Federal T556 TNB1, Hornady 5.56 75-grain Interlock HD SBR Black, or Hornady 5.56mm 75gr TAP SBR. (Actual suppression level will depend on ammunition and conditions.) This suppression level at the muzzle and at the shooter’s ear is made possible by specific tuning and baffle design, since a high level of muzzle suppression typically dramatically increases ejection port volume. An adjustable gas block is recommended to achieve this level of report at the shooter’s ear.

The 556 TAKE DOWN can be fully disassembled by the end user. As a somewhat unusual design feature, the 556 TAKE DOWN is disassembled from its front, so that the suppressor may be disassembled while its body is still installed, permanently or otherwise, on an AR-15 upper receiver or rifle.

It is designed to withstand at least 20,000 rounds before depot-level service comprising a firing schedule of 8 magazines fired rapid/burst/full-auto and then a cooling period. Although the suppressor has an indeterminate lifetime and will keep operating indefinitely, the baffles may be replaced by a depot-level service — for commercial customers, this is TBAC, the manufacturer — to regain the original suppression level. The baffles are salt bath nitride coated (melonite) to further extend their service lifetime.

SPECIAL FEATURES:

• Direct thread attachment option
  
• Nordlock (locking) washers included
  
• Toolkit and special tools available for purchase
  
• Rear wrench flats for installation/removal
  
• Pin hole on wrench flats for pinned/welded permanent installation
  
• Full disassemble-able from the front end, uses common tools
  
• Black nitride (melonite) coated baffles for longer service life
  
• 17-4 heat-treated stainless baffles, 316L tube
  
• When permanently pinned/welded to a 10″ upper, complete upper will no longer require a registered SBR host
• Minimum barrel lengths: 7″ 223 Rem, 5.56
• 27 ounces
• MSRP: $495

From TBAC’s Zak Smith in this thread on AR15.com:

The 556 Take Down was originally designed to meet the 2017 SURG solicitation (in conjunction with an upper obviously), which includes pretty stringent dB (ear and muzzle) and cost requirements, firing schedule / thermal requirements, as well as the ability to fully service and replace the core without removing the suppressor from the upper, and some other stuff that typically does not apply to the commercial market (like blank firing adapter compatibility and survivability when fired with live ammo by accident). The result of that design problem was this set of features.