Photo 3 of 42, Armalite AR18/180 (5.56mm)

Some of the changes in the design of the AR180 vs the AR15/M16, the AR180 used a gas piston system rather than direct gas impingement, an attempt to cure the "fouling" problems w/the early M16's (which wasn't really a problem w/the design), this also enabled Armalite to do away w/the rear recvr xtension (or buffer tube) which made it easier to incorporate a folding stock which had been a difficult problem w/the AR15/M16, it also used stamped steel upper/lower receiver halves which were easier & cheaper to mfg.

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Ar180 view w/M7 bayonet affixed Some of the changes in the design of the AR180 vs the AR15/M16, the AR180 used a gas piston system rather than direct gas impingement, an attempt to cure the "fouling" problems w/the early M16's (which wasn't really a problem w/the design), this also enabled Armalite to do away w/the rear recvr xtension (or buffer tube) which made it easier to incorporate a folding stock which had been a difficult problem w/the AR15/M16, it also used stamped steel upper/lower receiver halves which were easier & cheaper to mfg.
Photo 3 of 42, Ar180 R w-M7 bayo.jpg, 93KB, 1295x416, 1161 Hits Other Sizes: Original
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