After PDW and SCAR .You can open bolt with your WE GBB M4 now . Use to replace the original parts in your M4 Suitable For WE M4 Series Open Bolt / Open Chamber Gas Blow Black GBB Rifle
Make it real and Shoot Faster Have a greater blow back Effect : 1.More powerful Blow back recoil 2.Hide the part of your original Inner barrel
Highly recommend for M4 players who want a High simulation GBB Notes: Upgrading GBB require necessary skill & technique to dissemble , consult expertise if needed.
Open bolt Set include: 1.Inner Barrel 2.Loading MUZZLE 3.Trigger Set 4.Barrel Housing 5.Gas Block 6.Magazine Airtight Rubber 7.Bolt Catch
Color : Black Weight(Gram):632(With Box)
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