Thunder Beast Arms 338 ULTRA SR Suppressor, .338 Cal, Titanium, FDE Cerakote, SR Thread-Over-Brake Mount
The Thunder Beast Arms 338 ULTRA SR is a purpose-built .338-caliber centerfire rifle suppressor with a fully welded titanium core and tube, finished in Flat Dark Earth Cerakote. This SR variant uses TBAC’s thread-over-brake interface with a secondary locking collar for secure, repeatable mounting. It is in excellent condition and comes with the original factory box and literature.
Condition
Overall Condition: Excellent
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
What’s Included
- Original Thunder Beast Arms Corp. factory box with end label 'ULTRA 338 SR FDE'
- Yellow protective mesh tube sleeve
- TBAC literature cards (SR Muzzle Brake thread options and registration insert)
- Metal washer in plastic bag
This 338 ULTRA SR is designed for serious .338 applications, rated up to .338 Lapua Magnum and .338 RUM. The recessed front endcap is correctly sized for .338, and the tube diameter is 1.8 inches for stable handling and coverage over the brake interface.
The SR mount employs a thread-over-brake design with a secondary locking collar for positive retention. The collar features clear LOCK/UNLOCK legends and a detent window for tactile, visual confirmation. It is compatible with the TBAC 338BA Brake (v1 or v2), giving you flexibility in setup.
Construction is a fully welded titanium core and tube for strength and light weight, finished in Flat Dark Earth (FDE) Cerakote. The exterior shows helical/fluted machining on the tube and collar, and markings include Ultra-SR and .338 cal along with Thunder Beast Arms Corp., Cheyenne, WY.
The brake interface supports a wide set of thread options, including 9/16-24, 9/16-28, 5/8-24, 3/4-20, 3/4-24, 3/4-28, M18x1.0, and M18x1.5. The recommended brake is made from heat-treated 17-4 stainless steel to match the suppressor’s demanding use case.