Hello,
I’m about to purchase the PSA AR-15 pistol in 5.56 10.5". I’m wondering , is it true that I can swap a 300 Blackout upper to the 5.56 lower. That way I can shoot both rounds. I reload a ton of 556/223 but would love the option of occasionally reloading 300.
Thanks
Yes you can.
@kryingame
You can swap uppers and have a bunch of calibers…300blk, 6.5g, 6.8spc, 7.62x39, etc.
With 5.56 and 300blk, a word of caution. Color code or mark you stuff. Uppers and mags and if you reload even your boxes for ammo. 300blk WILL chamber in a 5.56 barrel, and that = a bad day.
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What can are you using?
Omega 300
Super quiet.
Just got a 300 blackout upper (7.5) from PSA and have a FEW AR15 FROM PSA HAVE SEEN ON LINE THAT "YOU CAN NOT PUT A 300 BLACKOUT UPPER ON A FULL SIZE AR15 LOW WITHOUT TAX STAMP? not sure if it is state to stae or everywhere? Today is spet 17,2024…
You cant put an upper shorter than 16" on a lower that has a stock without an SBR tax stamp. If it is a braced lower you are gtg.
1 Like
Yes