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    Don’t let the ever increasing cost of ammunition prevent you from enjoying your favorite AR-15 / M-16. Chiappa Firearms .22 conversion allows you the opportunity to shoot inexpensive 22 rimfire ammunition for training or just for fun! The M4-22 Rimfire Conversion contains all the parts necessary to change your AR-15 / M-16 from it’s existing caliber to the inexpensive .22LR rimfire cartridge.The conversion takes less than a minute and is achieved with no permanent alterations to your firearm. It can be quickly returned to it’s original caliber.

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    The GEN-II PRO SERIE Carbine is an evolution of the M4 model, adding a 7.8" free float aluminium forend with 8 position Picatinny rail. All other characteristics remain unvaried: 18.5" heavy match, parkerized barrel, steel bolt, MIL-SPEC components.
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    The GEN-II PRO SERIE Rifle is an evolution of the M4 model, adding an 11.8" free float aluminium forend with 8 position Picatinny rail. All other characteristics remain unvaried: 18.5" heavy match, parkerized barrel, steel bolt, MIL-SPEC components.