Home > AR15 Parts > Aero Precision 5.7 5" AR15 PDW Pistol Upper Group CQB Mk57 5.7x28mm AR-15 AR57

Aero Precision 5.7 5' AR15 PDW Pistol Upper Group CQB Mk57 5.7x28mm AR-15 AR57

Aero Precision 5.7 5" AR15 PDW Pistol Upper Group CQB Mk57 5.7x28mm AR-15 AR57

Part Number:AERO-57DBC33

On sale: $729.95

Retail Price:$869.95

You Save:$140.00(16%)

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Description

Aero Precision 5.7 5" AR15 PDW Pistol Upper Group CQB Mk57 5.7x28mm AR-15 AR57

Add the LIGHTEST Aero Precision Complete 5.7 Pistol Upper Receiver with this 5" Barrel and reliable CMMG 5.7x28mm Radial Delayed Blowback System to any existing AR15 lower to add this powerful cartridge to your arsenal! The 5” barrel this is the smallest 5.7 CMMG® has to offer.

Radial Delayed Blowback™ Operating System

Originally developed for the .45 ACP MkG platform, CMMG has adapted the Radial Delayed Blowback system across their pistol caliber lineup to create pistols and rifles with a softer recoil impulse and reduced bolt weight compared tthan traditional straight blowback systems. Check out CMMG Resource articles & video to learn more about what sets Radial Delayed Blowback apart.

Ultralight and compact while bringing higher capacity and power, this 5.7 Upper Group is a fantastic Close Quarters CQB Personal Defensive Weapon PDW choice for your next Short Barreled Rifles (SBR’s- All NFA Rules Apply) or AR pistol build.

Optional Muzzle Device Choices:

Strike Industries Warhog Mini Comp (pictured)

A2 Flash Hider

VG6 Gamma Brake

Strike Industries Cloak Hider

Levang Linear Compensator

Hera LCS Linear Compensator Small

Guntec Fake Suppressor

Includes:

Aero AR15 Assembled Upper Receiver with No Forward Assist
Aero 4" M-LOK ATLAS R-ONE Handguard
XTS Ambidextrous Charging Handle INCLUDED
CMMG 5” 1:9 Twist, Medium Taper 4140 SBN
CMMG 5.7 BCG INCLUDED
Product comes assembled with CMMG's Lifetime Quality Guarantee
The muzzle device that comes with this complete upper receiver must be selected and is NOT pinned nor welded to this barrel. NO MAGAZINE INCLUDED UNLESS ADDED.

Aero AR15 Upper Receiver with No Forward Assist Features:

M4 Feedramps
Forged 7075-T6 Aluminum
.250 takedown pin holes
Laser engraved T-marks
Port door installed

ATLAS R-ONE Handguard Features:

Full top picatinny rail for optional attachments
Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
Compatible with low profile gas blocks
1.3" Inside diameter
1.5" Outside diameter
Compatible with mil-spec AR15 upper receivers and barrels
Learn More about our NEW ATLAS Hanguards

5" 5.7mm Pistol Length Barrel Features:

Chamber: 5.7mm
Length: 5"
Twist: 1 in 9
Threading: 1/2"x28
Material: Chrome Moly Vanadium
Finish: QPQ corrosion resistant finish both inside and out
Gas System: Delayed Blowback
M4 Barrel Extension

Specs:

Shipping to FFL Dealer Required	No
Made In America?	Yes
Platform	AR15
Series	ATLAS
Caliber	5.7x28mm
Barrel Length	5"
Finish	Anodized Black
Weight	2lbs 6oz Including BCG and Charging Handle

Optional ADD-ON:

32 Round Mag

CMMG’s GEN2 5.7 AR Conversion Magazine holds 32 rounds of 5.7x28mm and fits in any standard AR15 lower receiver. To use, simply attach a CMMG 5.7x28mm Radial Delayed Blowback complete upper receiver to an existing AR15 lower. Then, insert CMMG’s 5.7 AR Conversion Magazine to safely feed 5.7x28mm ammunition. CMMG recommends using a standard carbine buffer and action spring to reliably cycle the action in this configuration. The 5.7 AR Conversion Magazine also retains last round bolt hold-open functionality, allowing for faster reloads.

CALIBER: 5.7x28mm

CAPACITY: 32 rounds

WEIGHT: 8oz(unloaded)