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.

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DUAL-LOK™ HRT-556™

$796.00

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Out of stock, available for pre-order

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Product Details

Brand: GRIFFIN ARMAMENT

Caliber Rating: 5.56mm

Mounting System: DUAL-LOK™

Materials: 17-4PH Stainless Steel & 718 Inconel

Weight: 14.4oz

Length: 5.9"

Diameter: 1.5"

User Serviceable: No, Fully Welded

Minimum Barrel Length: None

Full Auto Rated: Yes

Important Notes: DUAL-LOK™ Minimalist Brake 1/2x28 5.56mm (.22 cal) Included

Initially designed for elite HRT unit’s, Griffin Armament’s HRT-556™ model is the shortest addition to the DUAL-LOK™ family of suppressors which has to this point not been available to the general public. Griffin utilized the new DUAL-LOK™ active retention system with this suppressor, an often time demanded feature by government customers. This combined with generations of R&D brought a compact, highly durable, low flash, and top performing suppressor to market for government customers. Griffin is now releasing it to the commercial market.

The HRT-556™ features the patent pending DUAL-LOK™ mounting system, an accurate, robust, reliable, and wear free system with robust muzzle device support. The suppressor itself was designed to have minimal flash signature, despite its size, minimal weight, minimal POI shift, minimal gas blow back, maximum strength, durability, and sound performance. This was a tough list of performance attributes to tackle, but Griffin succeeded by bringing unbeatable sound suppression and flash reduction to this compact suppressor.

DUAL-LOK™ suppressors are machined in Griffin’s Watertown Wisconsin facility by freedom loving Americans.

This suppressor is NOT compatible with the DUAL-LOK™ Stealth Flash Suppressor (2.75") or the DUAL-LOK™ Bayonet Flash Hider.

FEATURES :

Utility patents pending
Wear free mounting system, requires no consumable parts
Taper lock interface ensures security and accuracy
ACME thread provides speed of attachment
Locking ring incorporates 3 anti-rotation teeth to eliminate inadvertent loosening
120 effective positions ensure a rock-solid suppressor mount and provide extremely low POI shift
17-4 stainless steel & 718 Inconel
Traditional Tube Design with internal flash hiding characteristics
Patent pending ECO-FLOW™ baffle system for reduced blow back
Patented flash reducing end cap
DUAL-LOK™ Minimalist Brake 1/2x28 5.56mm (.22 cal) Included
¾” wrench flats on muzzle devices
Collar Nitrided for increased surface hardness, corrosion, and wear resistance
Suppressor body H900 heat treated and Cerakoted
Available in black or FDE
Perpetual™ Lifetime Warranty

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DUAL-LOK™ HRT-556™

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.