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Plum Crazy Gen II RIA 5.56 NATO/.223 Rem. Semi-auto AR-15 Rifle
Forget "heavy metal"—polymer is the future. The Plum Crazy Gen II RIA features the metal-reinforced polymer upper and lower receivers…which help to reduce weight and increase maneuverability without sacrificing durability. The lower receiver features an over-molded metal insert, which reinforces the buffer tube housing and rear takedown pin. This allows for metal-on-metal contact with both the buffer tube as well as the rear takedown pin, delivering the strength and durability to withstand recoil and constant use.
In fact, the lower has been specifically tested to withstand all sorts of use and abuse. Plum Crazy put it through all the pressure and weight-bearing tests, similar to the US Military's testing, and found it to function flawlessly, even after supporting up to 250 lbs. and being run over by an 800-lb. forklift. Then, they ran 2,000 rounds through it without a hiccup.
But the weight reduction doesn't end with the polymer upper and lower receivers. The Gen II RIA also features the Nano composite parts kit. This kit includes the hammer, trigger, disconnector, and other components that are all made from composite material that's just as strong as metal—but at half the weight.