Heckler & Koch HK416 Adjustable Vented Gas Block, Factory New – For 14.5″ & 16” & 20″ Barrels


Heckler & Koch HK416 Adjustable Vented Gas Block – Factory New – For  14.5″ 16” 20″ Barrels


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SKU: HK-GB-ADJ-01 Categories: , , Tags: , , , , , Brand:

Product Info & Specs

Heckler & Koch HK416 Adjustable Vented Gas Block, Factory New – For 14.5″ & 16” & 20″ Barrels

These are factory original, genuine HK parts manufactured in Germany.  Heckler and Koch is internationally recognized for their high quality products, commitment to excellence, and their unparalleled, innovation.  Made with HK’s “No Compromise” dedication to quality, be assured you are getting the highest quality materials machined to precise specifications, flawless and resilient expert finishing to yield an impeccable product with immaculate fit and stability.

Sold disassembled – includes gas block, spigot (marked “38”), spring, detent, and roll pin. If you’ve assembled a AR lower, you can assemble the gas block. Images show an assembled gas block; all parts to assemble the gas block are included.

This factory new, genuine OEM HK416 adjustable vented gas block is compatible with the 14.5, 16, or 20-inch barreled HK416 & MR556 variants. Milled into the gas block are integral sling loops and bayonet lug. These gas blocks are the perfect backup or primary component to complete your HK416 build. Compatible with the MR556 and CR556 for those that want to swap the gas block for the HK416 version.

Spigot is marked “38.” Apparently there are dozens of different spigot variations made by HK.

Spigot vents are 1.25 mm and 1.5 mm.

10.4-inch barrels use a 1.0 mm vented gas block.  14.5-inch and 16-inch barrels use a 1.5 mm vented gas block.  We’re not sure about the intermediate vent size at 1.25 mm, but it is probably safe to say that this won’t work on a 10.4-inch barrel.  That said, we have not tried it and do not know if it will allow a 10.4-inch barrel to function or not.


Additional information

Weight 3 lbs
Dimensions 5 × 5 × 3 in

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