Pistol Caliber Upper Assemblies

Pistol Caliber Upper Assemblies | Premium Quality Uppers by Moriarti Armaments

Pistol caliber upper assemblies for PCC rifles and AR pistols in 9mm, .40 S&W, .45 ACP, 10mm Auto and .380 ACP, from 3" micro uppers to 16" carbines. Choose slick side or side charging, LRBHO or non-LRBHO, and shrouds, flash cans or M-LOK handguards.

Shop by caliber: AR-9 uppers, AR-40 uppers, AR-45 uppers, AR-10mm uppers and AR-380 uppers. 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.

Will a PCC upper fit my AR-15 lower?

No. Pistol caliber uppers need a matching PCC lower (or a magazine-well conversion block) for that caliber and magazine type.

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.