AR-45 .45 ACP 7.5" Slick Side Upper, BCG and Charging Handle, Non-LRBHO

AR-45 7.5" Upper: Specs

The AR-45 .45 ACP 7.5" Slick Side Upper from Moriarti Armaments delivers compact firepower in a minimalist platform, ideal for pistol-caliber builds. Built on a non-LRBHO slick side upper receiver, this complete upper assembly includes a 7.5" match-grade barrel, free-float M-LOK rail, ramped BCG, and charging handle—all factory assembled and test fired.

Features

Barrel:

• 7.5" match grade barrel chambered in .45 ACP

• 4150 CrMoV steel, black nitride finish

• 1:16 twist rate

• Threaded .578x28 with A2 flash hider

• Integrated feed ramp

• Blowback operation

Upper Receiver:

• Slick side billet upper made from 7075-T6 forged aluminum

• Hardcoat anodized per MIL-8625 Type III Class 2

• Compatible with AR-15, AR-9, and AR-45 mil-spec components

Gas System:

• Blowback system for reliable pistol-caliber cycling

Handguard:

• 7" lightweight free-floating slim Moriarti M-LOK rail

• Aircraft-grade aluminum, black hardcoat anodized

Bolt Carrier Group:

• Ramped BCG

• US-made 8620 steel, phosphate finish

• Precision machined for Glock and Colt style AR-45 lowers

• M16 cut

Charging Handle:

• Standard AR-15 charging handle included

Images shown are for reference only and may not represent exact configuration. For optimal performance, pair this upper with a heavy buffer (minimum 8 oz) when building an AR-45 pistol.

Looking for a shorter barrel? View the AR-45 .45 ACP 4" Slick Side Cone Upper – Moriarti Armaments.

FAQ

What lower does it fit?

A dedicated pistol-caliber AR lower that takes Glock-style .45 ACP magazines. A standard AR-15 lower with 5.56 magazines will not feed it.

How does it operate?

It is a direct blowback pistol-caliber design with no gas tube or gas block, so a heavy PCC buffer is used for reliable cycling.

Does the bolt lock back on empty?

No. This is a non-LRBHO setup, so the bolt does not hold open after the last round.

Is a lower receiver included?

No. This is an upper assembly only; the lower receiver and magazine are sold separately.

Related: AR-45 upper assemblies · pistol caliber carbines

Images may not be an exact representation of the product.