action army inner barrel spacer fit with tokyo marui vsr 10 gspec/well mb02 made in taiwan action army these barrel spacers are designed specifically for the extreme precision inner bull barrel for the vsr10 gspec pro sniper length barrels. there are o-rings on the outside and inside of each spacer which absorb excess vibration and keep the inner barrel perfectly centered which improves accuracy at longer ranges. fit with marui vsr 10 gspec