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Old December 18, 2019, 02:40 AM   #1
Senior Member
Join Date: November 10, 2008
Location: East Texas
Posts: 1,326
7.5” Barrel AR 5.56 or .300 Blackout?

I have this crazy idea of building a cheap AR to keep in my vehicle. An AR pistol with a 10.5” barrel is just a little too long for where I want to keep it so I plan on building one with a 7.5” barrel.

The excuse is is that I need an AR to go with the 9mm and the SHTF bag I already keep in the vehicle. The real reason is that I just want to build another AR, but I don’t want the warden... oops, darn autocorrect... the wife to find another new gun in the gun safe during the weekly shakedown.

The plan so far is a PSA stealth lower and parts kit, Shockwave Blade, Magpul grip, and either a PSA or Bear Creek upper. The only question is should I stick with 5.56 to maintain ammo, magazine, and parts compatibility for SHTF or should I go with .300 AAC in case the short barrel doesn’t give the 5.56 enough velocity to really do its job?
“Nature intended me for the tranquil pursuits of science, by rendering them my supreme delight.” - Thomas Jefferson
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