HK91, G3 A3 Retractable Buttstock - New Old Stock
A genuine German HK steel A3-pattern retractable buttstock for the HK91 and G3, sold as new-old-stock through HK Parts. HK Germany no longer produces this stock; remaining new-old-stock units are increasingly rare. Does not fit the V51 or PTR PDW pistols, or a rifle using a collapsing recoil rod.
- Category
- Stock
- Manufacturer
- Heckler & Koch
- Weight
- Not recorded
- Mounts at
- Rear
Specification
Everything measured
IdentityWhat it is and who made it.
- Category
- Stock
- Manufacturer
- Heckler & Koch
- Model number
- HKP-22104
- Factory part
- No
FitmentThe interface it offers and the one it needs, rather than a list of guns it claims to fit.
- Mounts at
- RearThe back of the receiver, where a stock, a brace or a buffer tube attaches.
HK G3 / HK91 stock interfacestock:hk-g3
Needs
ProvenanceEvery figure above was taken from one of these pages. The confidence reflects how much of the record came from a page a claim can be checked against.
Confidence in this record
60%
Stockists
Where to buy
Offers link straight to the shop. GunSpec never takes the order.
No shop has listed this part yet
Stock and prices come from the shops themselves. If you sell this part, you can list it and it appears here.
List a partCompatibility
Which firearms take this part
Studio
Every firearm this threads onto, resolved
Not a list the maker typed out: the answer comes from the interface this part needs and the mounts each firearm exposes, so it stays right when either one changes.
- The reverse lookup on every part in the catalogue
- Interface standards, platforms and fit overrides
- The same answers through the API and the MCP server
Requires a signed-in GunSpec account on the Studio plan. The answer is computed per firearm, so it is not part of the public record.
API
The call that returns this record
The same fields, in the same units, from the same endpoint the page reads.
curl --request GET \ --url 'https://api.gunspec.io/v1/attachments/hk-g3-a3-retractable-stock-nos' \ --header 'X-API-Key: your_key'{ "id": "hk-g3-a3-retractable-stock-nos", "name": "HK91, G3 A3 Retractable Buttstock - New Old Stock", "category": "stock", "manufacturer": { "id": "heckler-koch", "name": "Heckler & Koch" }, "weight_g": null, "length_mm": null, "requires_position": "rear", "provides": [], "requires": [ [ { "id": "stock:hk-g3", "name": "HK G3 / HK91 stock interface", "kind": "stock_mount" } ] ]}