The HBC model, our "Heavy Barreled Carbine", is a close cousin to the MPC model above except for its barrel – see the barrel comparison below. Some shooters feel the heavy profile provides more rigidity and accuracy, but either way its all 100% Windham Weaponry quality.Features:Gas impingement systemM4A4 type flat top upper receiver with detachable carry handleM4 double heat shield handguards/A2 black plastic gripA4 dual aperture elevation and windage adjustable: 300 to 600 M rear sightAdjustable height square post in A2 standard base
