Take a look at the ArmaLite A10A4CBFX. This carbine takes the AR-10A a step further with free-float quadrail handguards specially fitted to a low profile gas block. This allows maximum hand placement choice and accessory locations when a longer handguard is placed on a shorter gas system upper half. The result is a hardworking, flexible firearm with astounding accuracy. This AR-10A Carbine accepts third party polymer magazines. It is functionally identical to the traditional AR-10B carbine which takes only ArmaLite's proprietary steel magazines. However, the AR-10A Carbine accepts polymer mags, not ArmaLite s traditional AR-10 B s steel mags.
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