PRE-ORDER Guidance
As you are probably aware, recent updates to ATF's eForm approval process has resulted in drastically improved turnaround times. While this is certainly a positive change, it has also had a predictable impact on suppressor inventory across the industry.
With that in mind, if you know you want a particular suppressor (or three) and it isn't in stock, your best bet is to place a "PRE-ORDER" so that we can purchase your desired suppressor the moment it becomes available from our distributors. If you wait until it shows in-stock on the website, you might miss your opportunity. PRE-ORDER helps us seek out and purchase what you are looking for. This is true whether you buy from us or someone else.
Thank you for considering Longbow Arms, we hope to earn your business.

DUAL-LOK™ Stealth Flash Suppressor (2.25")
Griffin Armament is proud to introduce DUAL-LOK™, our newest QD mounting system for rifle suppressors. The DUAL-LOK™ system is comprised from two parts, the DUAL-LOK™ Mount and the DUAL-LOK™ muzzle device (of your choice). This page is for the DUAL-LOK™ Stealth Flash Hider 2.25".
The muzzle device integrates 60 machined mounting position grooves, which is doubled by the mount’s two locking positions, hence the double entendre DUAL-LOK™. How is this achieved? The mounts’ two locking positions are machined out of phase of one another by 3 degrees which provides the 120 effective locking positions and ensures a tightly mounted and locked suppressor. When the suppressor is installed, only one of the two positions will generally function by allowing the spring to push the locking collar rearward over the splines.
Time intensive R&D resulted in a high performance 3 prong flash hider with incredible resonance reduction. These suppress flash extremely well and do not ring or ping when fired, hence "stealth". CNC Machined of heat treated 17-4 ph stainless steel material and Melonite QPQ treated ensures durable, corrosion free service life.
Diameter: | 1.07" [grooves] .93" [unit] |
OAL: | 2.34" |
Weight: | 3.3 oz |
Materials: | 17-4PH Stainless Steel |
Finish: | QPQ Nitride |
KEY POINTS :
- Utility patent pending
- Wear free mounting system, requires no consumable parts
- Anti-Resonance flutes to prevent pinging under fire
- Taper lock interface ensures security and accuracy
- 120 effective positions ensure a rock-solid suppressor mount and provide extremely low POI shift
- 2.25" length
- Pre-drilled for pinning & welding 14.5" barrels to 16" OAL
- 17-4 PH Stainless steel
- Nitrided for increased surface hardness, corrosion, and wear resistance
- ¾” wrench flats on muzzle devices
- No timing or shims required
Inventory and Ordering Guidance
Longbow Arms attempts to keep popular items in stock, however, if you want something not listed on the site, please reach out to us so we can discuss ordering that item. Under normal conditions, non-NFA items can be ordered and received within 5-10 business days.
For NFA items, Dealer to Dealer and Manufacturer to Dealer transfers are subject to eForm 3 approval times which are currently running 7-14 days.