EDGE Custom 'Hard Rod' Guide Rod For Hi Capa 5.1 umarex airsoft You'll definitely need to replace

You'll definitely need to replace the bolt carrier and this is the perfect option

Silverback SRS Carbon Barrel Extension S for SRS A1 & A2 G-Spec Barrels / Sport Barrels

Silverback TAC 41 A Bolt Action Rifle (WG)

and the tension can be adjusted on each magazine individually

while VFC restores the entire mechanism and converts it to HOP-UP adjust knob

EDGE Custom 'Hard Rod' Guide Rod For Hi Capa 5.1 umarex airsoft You'll definitely need to replaceEDGE Custom 'Hard Rod' Guide Rod For Hi Capa 5. 1 7075 Aluminum Construction Design For Upgrade the Original Guide Rod Designed to stand springs with higher tension Suitable For Tokyo Marui Hi Capa 5. 1 Series Airsoft Gas Blow Back GBB Pistol