Hey, what can I say? It's a castle nut! It just happens to be 1/3 the width of the ridiculous 416 castle nut-which is why I bought it ... Cheers!
Design: 5
Quality: 5
Value for money: 5
Sold by HK PARTS
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Product details
Heckler and Koch Castle Nut for Buffer Tube for HK416 and HK MR556
New HK German manufacture. This buffer tube castle nut will fit both mil-spec and commercial buffer tubes. All steel manufacture. With HK round tool attachment points as well as traditional wrench attachment points.
Compatible With:
HK416, MR556
M27
Other AR, M4 and M16 projects
All reviews
Good product, fast delivery.
Delivery: 5
Design: 5
Quality: 5
Value for money: 5