The ACR "rifles" used smoothbore barrels to fire single or multiple flechette per round, rather than bullets, to provide long range, flat trajectory, and armor piercing abilities.
炮弹（抛射物）必须拥有稳定的外形，比如带尾翼的箭状物或球体，以此
小发射时的震动。
The ACR "rifles" used smoothbore barrels to fire single or multiple flechette per round, rather than bullets, to provide long range, flat trajectory, and armor piercing abilities.
炮弹（抛射物）必须拥有稳定的外形，比如带尾翼的箭状物或球体，以此小发射时的震动。
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