Golden eagle m4 gbbr build.
Started as a urgi, full metal body, ambi selector, ambi.mag release. Works great and shoots 340fps currently on ultra air.
Upgrades: 6.02mm tightbore barrel, maple leaf MR silicon hop rubber, maple leaf hard nub, shoots great on heavier weight bbs.
I have added, madbull mk18 handguard, bcm pistol grip and trigger guard, slimline b5  stock, angled foregrip. Tracer/suppressor,  works but is not that bright. I have changed the recoil weight for a modified real steel, original will come with it.
Will come with 3 ghk gmags, original boneyard mag as well. Due to it running on ghk mags, it doesn't like full auto,  but this never bothered me as I don't use full auto on gbbrs. This is fully working, got in November and worked fully through the cold months  just moving on to other builds. The hop is set for .28s and .3s, will easily hit targets at 60 to 70 meters, any questions just ask
£260 all in posted