10.5" .300BO barrel swap

General Discussion How To
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You are correct on the pins, they are tapered. You need 2/0 pins and a 2/0 tapered reamer to finish the drilled holes. Don’t run the reamer too far in or the pins will be too loose. I’m looking at doing this on a 5.56 barrel I have.

Did you try contacting Rock River Arms? They have a 300 blk rifle shown on their website, don’t know if they sell parts for it.

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bracketracer , I’ll give RR a look-see. Thanks for the tip, I’m kinda focused on PSA as I have the ar pistol in 5.56 that I plan to use as a donor, if possible.

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No go at RRA. I want a 300 blackout like my 5.56 fde pistol shown earlier. I’m a simple man with a simple request…:slightly_smiling_face:

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Best of luck to you