The Heckler & Koch G41 rifle was H&K’s attempt at building a modern version of the HK33 (which in turn was based on the H&K G3 7.62mm battle rifle). It should not be confused with the HK41 which is an entirely different gun.
The rifle is rarely seen because Heckler & Koch sold very of them and most of their customers replaced them soon after. The one group still using them is the Turkish Gendarmerie. The below photos show soldiers training at the Jandarma Özel Harekat (JÖH) Foca Commando School. Their G41 rifles were manufactured by MKEK under license from H&K. They appear to be fitted with some type of training/simulation apparatus.
Many thanks to Ilgar for the photos.