If I recall correctly, those are a quite rare AR-10 variant with single digit amounts still surviving. The featureless muzzle in this picture always catches my eye.
What makes this variant so rare?
Rather than guess from memory, I looked it up.
The rifles were made on contract for KLM, and had a combination of features specific to that run. No one feature was too crazy, but this particular contract run of rifles was a small batch, and thus rare. 16 inch barrels with no muzzle device, semi-auto only, takedown pins on a chain.
What features would you otherwise find on a muzzle?
A flashhider of some type would be seen on most variants sold by Armalite in the era.
Damn, Princess Leah did not take the destruction of Alderman well.
This is on purpose right?