They are unique to the SL8 due to the odd single-stack conversion that was done from the G36 for civilian sales. Looks like all the ones sold here are out of stock: budsgunshop.com/search.php/type/gun+magazines/q/sl8 Elsewhere, I've had good experiences with HKparts who sell this: https://hkparts.net/all-parts/h-k-sl8-5-56-223-10-round-factory-magazine/ I would absolutely not trust Botach.

Hi Christopher and welcome. It takes H&K SL8 Magazines : https://botach.com/heckler-koch-sl8-223-rem-10rd-mag/ ----------------------------------------------- https://promagindustries.com/hk-sl8-6-223-20-rd-black-polymer/