SqbBOil May 26, 2017 at: 900 × 860 In: Should the Next Rifle Be a Bullpup? Honest Accounting Applied to the Rifle-Ammunition System Next → Left to right: The 20″ barreled bullpup GPC case, the 14.5″ barreled conventional GPC case, and the 16.5″ barreled conventional GPC case.