Absorb the shocking effect to create smooth operation. So good!
We have done all the hard work and spent a lot of money in research for you and these parts that I am now selling are the best and will be the right type of upgrade that will give you the best benefits.
YOU ARE BUYING BEAST UPGRADE:
# 1x Spring Cushion (tail absorber). Cushion spring tail for Smoother operation in fire and return strokes. Less wear. Less chance of damage.
MKM2 SCAR M4 AK47 ETC
The spring spike in photo not included obviously.