AR-45 Upper for Sale – 45 ACP Upper Assemblies

AR-45 Upper for Sale | Premium 45 ACP Upper Assemblies by Moriarti Armaments

AR-45 upper assemblies chambered in .45 ACP for pistol caliber carbines and AR pistols. Barrel lengths are 4", 7.5", 8", 8.5", 10.5" and 16", in billet and forged slick side or side charging versions, with LRBHO and non-LRBHO options and M-LOK or shroud handguards.

Most uppers include the blowback bolt carrier group and charging handle; a few are sold without the BCG, which is stated on the listing. Upper receivers are not serialized, so they ship directly to your address where legal.

FAQ

What does LRBHO mean?

Last round bolt hold open: the bolt locks back after the last shot. It needs a matching LRBHO lower and magazine. Non-LRBHO uppers are listed as such.

Do I need a special buffer?

Yes. .45 ACP blowback uppers run best with a heavy buffer, such as the 10 oz AR-45/AR-10mm buffer. See PCC stocks & buffers.

Can I put a barrel under 16" on a lower with a stock?

Only with an approved ATF Form 1 or Form 4 first: a stock plus a barrel under 16" makes a short-barreled rifle (SBR). On a pistol lower with a brace or bare buffer tube it can be built as a pistol where legal.