9mm AR Billet Upper Receiver with LRBHO (Last Round Bolt Hold Open).
- Measurements: 7.662″ x 1.375″ x 2.314″
- Machined from 7075 T6 aircraft grade billet aluminum
- Matte black hard-coat anodized per Mil 8625 Type 3 Class 2
- Compatible with all standard AR-15 / AR-9 components and most aftermarket parts
- Contains integrated Last Round Bolt Hold Open (LRBHO) technology
- LRBHO feature is designed for lowers that accept Glock style magazines
- NOTE - this upper is not machined for a gas tube as it is intended for blowback gas systems only