This is an excellent example of an early AR10/Armalite style semi-automatic part set that was produced on an early commercial XM10 semi-automatic receiver as produced by the TELKO N/C arms company in Miamisburg Ohio. These early commercial AR10 rifles were the forerunner of all the later full automatic and semi automatic military or Black Sporting type rifles produced and imported in the mid to late 1960s up through the late 1980s. Originally these commercial rifles were assembled or produced by using original AR10 part sets produced by the Dutch firm of "AI" on one of the current commercial lower receivers that were being produced during the early 1980s. There were two kit configurations available at this time, those produced for the Portuguese contract and the other for a Sudanese contracts, this rifle uses one of the Portuguese kits. The upper receiver is marked on the left side with a double British firing proof that consists of a "Crown/BNP" and "Crown/SP" proof next to "20T" with the lower edge marked "CAL.. 7,65mm, NATO-006536" with "XM10" marked on the lower right magazine well. This rifle has the original brown plastic stock, pistol grip and hand guards. This rifle is complete with three original "Armalite" marked "waffle" pattern magazines, a black nylon sling and a black nylon carrying case.