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The Remington GPC introduced in 2010 was a AR-15 derivative with an extruded upper receiver acting as a barrel cooling jacket mounted with STANAG rails.〔(【引用サイトリンク】title=Photo of Remington GPC )〕 A derivative product called the Modular Gas Piston Carbine was being offered to the US Army for its Aborted Improved M4A1 Program . It features a Ferritic Nitrocarburized (FNC) coating, 10.5 inch or 14.5 inch barrel offerings with a six groove 1:7 right hand twist. The hand guard is an eight-sided ventilated free floating unit with monolithic Mil-Std-1913 rail on the upper portion and user configurable rail sections that can be added on the other seven sides. The Remington R5 RGP is essentially a gas-piston derivative of the previous Remington R4, itself a clone of the AR-15/M16/M4 series.,〔(【引用サイトリンク】title=New from Remington Defense: R5 RGP Gas Piston AR-15 )〕 The standard R5 comes with a Magpul stock and an Ergo rifle grip.〔(【引用サイトリンク】title=Remington Defense )〕 ==See also== *List of assault rifles *Modern sporting rifle *R5 RGP *Heckler & Koch HK416 *LWRC M6 *Barrett REC7 *SIG SG 516 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Remington GPC」の詳細全文を読む スポンサード リンク
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