Advanced Armament Complete 300 AAC Blackout 9 Inch Receiver Assembly is designed for use with a carbine receiver extension, standard GI buffer spring and an H2 buffer. Ready to drop onto your AR15/M16/M4 lower. Works with an AR lower with Mill-Spec push pin locations.
Advanced Armament Complete 300 AAC Backout 9 Inch Receiver Assembly Specifications:
- 9 inch Nitrided 1:7: Twist Barrel, threaded 5/8-24
- AAC 51T BLACKOUT Flash Hider
- Full Auto BCG
- KAC URX Rail