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to provide a fast, secure, and enjoyable experience. by Doug, from CO, United States Asked on April 21, 2022
For an AR15 chambered in 300 Blackout the Geissele Premium AR-15/M4 Mil-Spec Buffer Tube Assembly w/ Super 42 Spring will work. I recommend using one of the H2 models. However, depending on barrel length and gas system length you may want to use an H3 model.