- Replaces the Factory Bumper on the back of the receiver
- Installs in minutes
- Helps reduce felt recoil
- Uses a 25# waves spring and clear hard Polyurethane
- Engineered for long use
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- Comes with spring
- Adds 20 more rounds
- Designed for fast, easy cleaning
- Allows for bolt hold open
- Made of delrin
- Machined in house
