AR-45 .45 ACP 4" Tactical Upper Assembly – Slick, American Flag Charging Handle, Non-LRBHO

.45 ACP Micro Upper: Specs & Features

AR-45 .45 ACP 4" Tactical Upper Assembly / American Flag Charging Handle / Non-LRBHO  from Moriarti Armaments is designed for compact performance and sleek aesthetics.This upper comes fully assembled with premium components, including a liniar compensator  and AR15 American flag charging handle.

Features

Barrel:

• 4 inch match-grade barrel chambered in .45 ACP

• 4150 CrMoV steel, black nitride finish

• 1:16 twist rate

• Threaded .578x28, includes aluminum linear comp

• Integrated feed ramp, blowback operation

Upper Receiver:

• Slick side billet receiver made from 7075-T6 aircraft-grade aluminum

• Type III Class 2 black hardcoat anodized

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

Gas System:

• Blowback system for reliable cycling with .45 ACP

Handguard:

• 4 inch slim-profile free-float M-LOK handguard

• Aircraft-quality aluminum, black hardcoat anodized

Bolt Carrier Group:

• AR-45 ramped BCG

• US-made 8620 steel with phosphate finish

• Precision milled for Glock and Colt style .45 ACP lowers

• M16 cut

Charging Handle:

• American flag laser-engraved standard AR-15 charging handle included

Upper assembly comes complete and ready to drop into your AR-45 lower. As with all .45 ACP builds, a heavy buffer is recommended for optimal cycling and performance. Images may not be the exact representation of the product. Mlok designs may differ based on stock availability, the same excellent quality.

Looking for a full-size build? See the AR-45 .45 ACP 16" Slick Side M-LOK Upper with LRBHO – Moriarti Armaments.

FAQ

Is a lower receiver included?

No. This is an upper assembly only; the lower receiver, magazine and sights are not included.

What lower does it fit?

A dedicated pistol-caliber AR lower, such as a Glock-pattern lower using .45 ACP Glock-style magazines. A standard AR-15 lower with 5.56 magazines will not feed it.

How does it operate?

It is a direct blowback system, so it has no gas tube. A heavy PCC buffer is used for reliable cycling.

Does it have last round bolt hold open?

No. It is a Non-LRBHO design, so the bolt does not lock back on an empty magazine.

Related: .45 ACP Micro ARP · all Micro ARP pistols and uppers