Zenith MP5 problem | HKPRO Forums
Firearm used: new Zenith Z-5RS w/ semi-shelf for sear use 9mm ammo used: S&B 115, Blazer 115 brass, Fiocchi 115. Bolt group used: genuine HK complete MP5 bolt group Lower: Qualified sear in 4 position Problem: Won't fire after 60rds / Bolt not fully closing I've Zenith Z-5RS that was properly...