Pick up one of our HK UMP GBB Rebuild Kits. It's got all the parts you need to bring back the joy you experience when firing your gas blowback UMP on full-auto .
So you caught the broadside of your buddy's helmet with your HK UMP GBB SMG during some intense close quarter battle action and now the bolt doesn't quite cycle with a snap like it used to. Never mind the hurt you just brought to your battle buddy's brain bucket, you've got a gun to fix! Whatever you do, don't recycle it. Rebuild it! Pick up one of our HK UMP GBB Rebuild Kits. It's got all the parts you need to bring back the joy you experience when firing your gas blowback UMP on full-auto with reckless abandon! Please shoot responsibly, though. Seriously.
**Disclaimer: This product is not a firearm and is not designed for use as a dangerous weapon. It is an accessory intended for use in paintball or airsoft activities. Please be aware that this item complies with all safety regulations relevant to its intended purpose. Any mention of firearms or dangerous products is for descriptive purposes only. Ensure compliance with local laws and regulations governing the use of paintball and airsoft accessories. If you have any questions or concerns, feel free to contact us for clarification.**
