HK417/MR762 GEN 3HK FOLDING STOCK ADAPTER

HK417/MR762 GEN 3HK FOLDING STOCK ADAPTER

 HK417/MR762 Gen 3 Folding Stock Adapter

Bridges the gap between the HK417 or MR762 receiver and a side-folding stock, converting a fixed or non-folding setup into one that folds flat for storage or transport. The one thing worth confirming before you order: this is the Gen 3-specific version, and HK has revised the receiver interface across generations enough that a Gen 2 adapter won’t necessarily bolt onto a Gen 3 gun without checking first.

Material is generally steel or aluminum depending on the specific adapter, built to handle the stress of a folding hinge under recoil from a caliber that isn’t gentle to begin with — this isn’t a part where a lightweight polymer adapter would hold up over time, and reputable adapters in this category are built accordingly. Exact weight and dimensions here: verify, since HK417/MR762 GEN 3HK FOLDING STOCK ADAPTER vary between manufacturers in both material choice and folding mechanism design, and we’d rather you confirm the number against this specific listing than assume it matches a similar-sounding adapter from a different maker.

  Gen 3 compatibility, specifically

HK has updated the 417 and MR762 platform across a few generations, and the receiver extension interface isn’t identical across all of them. Gen 3 rifles use a specific buffer tube and receiver extension pattern that this adapter is built to match, and installing a HK417/MR762 GEN 3HK FOLDING STOCK ADAPTER on a Gen 3 gun, or the reverse, is a common enough mistake that it’s worth double-checking your rifle’s actual generation rather than assuming from purchase date or model name alone. If you’re not sure which generation you’re working with, check your rifle’s markings or documentation, or reach out before ordering — getting this wrong means the adapter simply won’t seat correctly on the receiver.

 Fitment

Built specifically for Gen 3 HK417 and MR762 rifles — it is not interchangeable with Gen 1 or Gen 2 adapters, even though the platforms share the same basic design lineage and outward appearance. It will not fit HK416 or HK MP5-pattern receivers, which use a different buffer tube and stock interface despite being from the same manufacturer family. What we see people confuse most often is assuming “HK417/MR762 GEN 3HK FOLDING STOCK ADAPTER” is a single universal part across every production year — HK’s own running changes across generations mean it isn’t, and a mismatch here isn’t a minor fitting issue, it’s a hard incompatibility. If your rifle has had any aftermarket receiver extension or buffer tube work done, verify that work matches Gen 3 factory spec before ordering, since custom builds sometimes deviate from stock dimensions.

Ordering through eurogunandpartshub.com means this comes from within the EU rather than shipping from a US-based HK parts supplier, which generally translates into a cleaner customs process and quicker delivery across the UK and Europe. A folding HK417/MR762 GEN 3HK FOLDING STOCK ADAPTER is typically treated as a non-restricted accessory across most EU member states and the UK, since it’s stock hardware rather than a regulated fire control component — but HK417/MR762-pattern parts specifically can draw more scrutiny in some countries given the platform’s semi-military lineage, so it’s worth checking your own national import rules before ordering rather than assuming accessory status carries through automatically. We handle export documentation and customs declarations from our side. Delivery timing varies by destination, generally faster into Western Europe than further east, so flag any deadline before checkout if it matters to you.

Demand unconfirmed for this specific Gen 3 adapter in the European market — the HK417/MR762 platform has a dedicated following among European shooters, particularly where the caliber and pedigree matter to buyers, but we don’t have hard sales figures on this exact adapter here. A few questions tend to come up before people commit to buying one. The most common is whether this adapter works with aftermarket folding stocks from third-party manufacturers, and generally yes, provided the stock itself uses a standard folding mechanism interface — but it’s worth confirming the specific stock’s mounting pattern against this adapter rather than assuming universal compatibility. The second is whether installing a folding adapter affects the rifle’s factory accuracy or point of impact, and properly installed, it shouldn’t, since the adapter changes how the stock folds rather than how the action beds or how the barrel free-floats. The third thing people ask about is whether the folding mechanism holds up to repeated folding and unfolding over time without developing play in the hinge, and that depends heavily on build quality — a well-machined adapter should hold tight for years of normal use, though it’s worth periodically checking the hinge for looseness the same way you’d check any mechanical HK417/MR762 GEN 3HK FOLDING STOCK ADAPTER joint on a rifle.