Custom Upgrade for QD Gearbox models to your requested power up to 400 (1.5 Joules)
Any model, Excluding M14, EBR, SVD and M24.
Also Excluding short barrel models. MP5K and MP5K PDW etc.
Please include with your order the details of your power requirement.
Also please note this will add extra time to your models shipping time.
|Barrel Length :||No|
|BB Capacity :||No|