The Beretta ARX100 has a telescopic folding stock, as well as a fully ambidextrous safety selector, magazine release and bolt release. Additionally, the charging handle is reversible. The Beretta ARX100 also has an adjustable gas valve designed to take into account the large swath of ammo available on the market today. The chrome lined barrel, which has a 1:7 twist rate, can be removed and replaced with a number of different lengths and calibers in just seconds.
Furthermore, Beretta ARX100 has a full-length Picatinny rail and removable back up sights. With no pins, the ARX100 is also capable of being disassembled without the use of tools.
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