Guns Modify Hopup Tensioner (9 Parameter in 18pcs) for AEG/ Marui MWS GBB (0.20-0.30g BB)

Guns Modify Hopup Tensioner (9 Parameter in 18pcs) for AEG/ Marui MWS GBB (0.20-0.30g BB) Designed to work with a wide variety of parameters which gives the shooter better control over how you want your hop-up to be set up Each combination is designed to provide ideal shooting consistency for BBs weighted 0.2 - 0.3 grams 9 Parameters Compatible Suitable For Tokyo Marui M4 MWS Gas Blow Back GBB Rifle Airsoft Guns