Pro-Arms 130% Steel Recoil Spring Guide Rod for SIG AIR / VFC P320 M17 GBB Length-(mm)_221 Adds a little weight to

Adds a little weight to the magazine to facilitate a smooth action of free drop of magazines and adds durability to the base of the magazine from damages of dropping

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Pro-Arms 130% Steel Recoil Spring Guide Rod for SIG AIR / VFC P320 M17 GBB Length-(mm)_221 Adds a little weight toPro Arms 130% Steel Recoil Spring Guide Rod for SIG AIR VFC P320 M17 GBB Steel Construction 130% Power Designed to increase the felt recoil impulse, durability, and cycling speed Suitable For SIG AIR P320 M17 Series Airsoft Gas Blow Back GBB Pistol