Home AR-15 .300 Blackout AR-15 Barrel Change

.300 Blackout AR-15 Barrel Change

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Steve Ostrem goes over the proces of changing a .223/5.56 AR-15 to 300 Blackout by simply changing the barrel. This video will instruct you on the tool needed to accomplish this task as well as a step-by-step process to change your barrel.
16” 300 Blackout 1-8 Govt Carbine Gas System Barrel 080-001-268

Upper Receiver Action Block 080-000-661

Gas Block Roll Pin Punch Kit 080-001-127

AR-15 Armorer’s Wrench 080-001-208

Go, 300 Blackout Headspace Gauge 100-011-283

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10 COMMENTS

  1. Man I love you guys videos. Thanks

    So I'm doing a new build on a 300bkackout. It has a 10 inch barrel but I didn't buy a 300 blackout upper. The upper and lower receiver are both 556/223 standard but from what I'm reviewing here that's okay? I don't need a 300 acc upper receiver? If that's true before I finish is there anything else I may need to do to make thing flow properly?

  2. Headspace gauges are required, but torque wrench is optional?

    Never had a fully chambered barrel with excessive or too little headspace. I have had issues with out of spec uppers that required as many as 75 foot pounds to align the nut beyond the minimum of 25. Pretty hard to measure those values without a torque wrench.

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