Product Description Harris Engineering 6: The No. 6 adapter will fit European size rails about 3/8\" across rail slot. Harris Bipods 6 No. 6 Rail Adapter European 3/8\" Black Metal at Classic Firearms Browse all Classic Firearms deals $9.75 In Stock at Classic Firearms Buy Now at Classic Firearms Secure checkout Easy returns or compare prices Amazon eBay Product Details Brand Harris Engineering MPN 6 Accessories Harris Engineering