Complete Uppers

ACME Machine complete uppers are made in the USA and built in Fort Wayne, Indiana, from 7.5" pistol uppers to 24" precision uppers. Every ACME upper is backed by our lifetime warranty for the life of the product. Pin it to your lower and go shoot.

Calibers and barrel lengths

How to choose an upper

• Home defense and truck guns: 10.5" to 16" in 5.56 or 300 Blackout. Short, handy, and easy to suppress.
• Hunting: 350 Legend for straight-wall states, 6.5 Grendel for deer at longer range, 450 Bushmaster for big game.
• Precision and competition: 18" to 20" .223 Wylde, 224 Valkyrie, or an AR-10 in 6.5 Creedmoor. These are the same barrel lengths ACME Rifles' national champions shoot.
• Plinking and training: 22 LR or 9mm for cheap practice on the lower you already own.

What's in the box

Every ACME Machine complete upper comes assembled and headspaced, with the bolt carrier group and charging handle included. An upper is not a firearm, so it ships straight to your door with no FFL needed.

Lifetime warranty

ACME Machine and ACME Rifles products are covered for the life of the product. Barrels are a wear item: their service life depends on round count, ammunition and care, so normal barrel wear isn't a defect.

Questions

Will an ACME upper fit my lower?

Yes. AR-15 uppers fit any mil-spec AR-15 lower, and AR-10 uppers fit DPMS-pattern AR-10 lowers.

Do I need an FFL to buy an upper?

No. In most states the upper receiver isn't the serialized part, so it ships directly to you. Check your state and local laws before ordering.

Where are ACME uppers made?

In Fort Wayne, Indiana, by the same shop that builds ACME Rifles' sub-MOA guaranteed AM-15 and AM-10 rifles.