CowCow Aluminum Blow Back Unit For Marui G19, G17 Gen.4 GBB (Black)

For Marui G19, G17 Gen.4 Gas BlowBack Pistol

- 6061 Aluminum material with CNC machined
- Ultra lightweight design
- Durable construction prevents flexing and warping under hard use
- Provide stable and smooth blowback cycling
- Perfect Fit with COWCOW piston head