Daniel Defense Direct Thread Suppressor Mount, 1/2×28 to 1.375×24

Product Description

The Daniel Defense Direct Thread Suppressor Mount, 1/2×28 to 1.375×24 (part 06-140-00327) is a SOUNDGUARD direct-thread adapter that takes the industry-standard HUB 1.375-24 UNS rear thread of a SOUNDGUARD suppressor and presents a 1/2 x 28 muzzle thread, so the can threads straight onto a 1/2 x 28 barrel with no muzzle device or proprietary mount involved.

Key Facts

• Brand: Daniel Defense
• Model: SOUNDGUARD Direct Thread Suppressor Adapter, 1/2-28
• SKU / MPN: 06-140-00327
• Type: Direct-thread suppressor adapter – not an NFA item, no transfer required
• Suppressor interface: HUB 1.375-24 UNS, industry standard
• Muzzle thread: 1/2 x 28
• Designed for: Daniel Defense SOUNDGUARD suppressors
• Function: Secure mounting, rapid attachment and detachment, and host swapping between compatible-caliber firearms

Which adapter thread do you need?

The adapter has to match your barrel, not your suppressor – the suppressor end is fixed at HUB 1.375-24 UNS. Choose 1/2 x 28, this part, for a 5.56 or .223 host: it is the mounting thread Daniel Defense lists for the SG-556 and SG-6TI, and the thread it uses on its own 5.56-class muzzle devices. Choose 5/8 x 24 for the larger-bore hosts the SG-30 series mounts on. An adapter does not change what a can is rated for, so match the caliber rating first. The adapter itself is unregulated, unlike the suppressors it mounts; see also our muzzle devices.

Ordering from Western Sport in Roanoke, TX

Western Sport is a Daniel Defense master dealer, a licensed FFL and an SOT, in Roanoke since 2007 with a gunsmith on site. Call 817-393-4000 with your suppressor model and barrel thread.

Frequently Asked Questions

Q: What does the Daniel Defense 1/2×28 to 1.375×24 suppressor mount do?

A: It adapts the rear of a SOUNDGUARD suppressor to a barrel. 375-24 UNS thread and the barrel end is 1/2 x 28, so the can threads directly onto a 1/2 x 28 muzzle with nothing in between. Daniel Defense describes the result as secure mounting with rapid attachment and detachment.

Q: Do I need an FFL or a tax stamp for this adapter?

A: No. The adapter is an unregulated accessory with no serial number, no NFA paperwork and no dealer transfer. Only the suppressor itself is a registered NFA item requiring a Form 4 transfer through an SOT dealer. Western Sport is an SOT, so we can handle both parts of the job.

Q: Should I buy the 1/2×28 or the 5/8×24 adapter?

A: Match the adapter to your barrel’s muzzle thread. 223 hosts and the mounting thread Daniel Defense lists for the SG-556 and SG-6TI. 5/8 x 24 is listed for the SG-30, SG-30TI and SG-30TIL. With hosts of both kinds, an adapter for each is normal.

Q: Will this adapter fit suppressors from other manufacturers?

A: 375-24 UNS, which Daniel Defense describes as an industry standard, and the adapter is sold as part of the SOUNDGUARD line. Whether a specific non-Daniel-Defense can uses that interface is a question for its maker – call 817-393-4000 with the model and we will help check.

Q: Can I move one suppressor between several rifles with these adapters?

A: Yes, that is the design intent. Daniel Defense states the HUB direct-thread attachment lets a SOUNDGUARD be switched from one firearm to another compatible-caliber firearm with an appropriately threaded muzzle. The limit is the can’s own caliber rating – the adapter changes the thread, not the rating.

Q: What is this adapter made of and what does it weigh?

A: We are not publishing a material or weight, because Daniel Defense does not state either for this part number. The titanium 5/8 x 24 version of the adapter is identified as titanium; this one is not described that way. If weight matters to your build, call 817-393-4000 and we will confirm.

Additional information