GBL Airsoft "The Captain" Metal Hop-up Unit for GHK M4 Series Airsoft Gas Blowback Rifle

"Captain America hop up is the best hop up I ever seen in my life im a fan boy of GHK and GBL I recommend this upgrade to everyone!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

"I bought this because I needed a new hop up... GHK STANAG mag feed lip broke, I double fed, and burst my plastic hop up... but MAN IS THIS AMAZING. I'm actually glad I had a reason to upgrade! The metal is extremely well built. When I'm double feeding, it just breaks the BB and I walk off to clean it off real quick. The bucking didn't want to co-operate to well upon insertion to the unit itself. Use a lot of lube and just don't give up. VERY SOLID PRODUCT, all the GHK players on my field use this product, or the TNT hop up system, the two option are simply the best for your GHK M4. Don't forget to pick up an AR wrench or you will never be able to change this yourself, otherwise get a tech to change it.

"This was ok. My gun works but sadly double feeds more than ever with this hop up. It didn’t really increase my range it actually kinda decreased it. Maybe I installed it wrong but it didn’t come with directions and I couldn’t find specific videos for it. Looks great and is somewhat solid. Part of the lip on the hop up got bent just from me testing it. Again I’m not a great tech but I had put an upgraded inner barrel in the gun before and knew how to disassemble and reassemble it. I’m sad with its performance. I would recommend it only if you really know what your doing I don’t know about the tnt one if it’s any better but it was a pain to get it set up and to not have it work properly was just a disappointment. maybe it will take some time just tinkering with it but over all not impressed.

"just aarived, was installing on my ghk m4 o-ring shredded when istalling
om upper receiver.

"i was looking forward to installing this in my gbbr but the bucking that this unit came with was nowhere near the right size. it ended up ripping itself apart and the large o ring got shredded when i went to go put it in my rifle.