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Aero Precision M4E1 Threaded PRO 13.7" CHF 5.56 M-LOK Midlength Complete Upper

Product price goes up by $143.04 in 00hrs : 00min : 00Sec

Save 27 % MSRP: $1,115.00 Original price was: $954.99.Current price is: $811.95.

Excluded from additional discounts. Holiday Price Protection Holiday Price Protection Info If the price drops within 30 days of your purchase, we’ll credit the difference.

Only 3 left in stock

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SKU: 17436 Categories: , , Description

The PRO Upper Receiver Group built around our PRO 5.56 Cold Hammer Forged Barrel that is paired with our PRO 5.56 BCG. Included ATLAS R-ONE Handguard, BREACH Charging Handle, and VG6 Delta muzzle device round this assembly out into a premium turnkey solution for your next build.

NOTICE: The muzzle device on this upper receiver is not pinned or welded. All NFA rules and regulations apply.

Includes:

About Cold Hammer Forging

Cold hammer forging differs from other common barrel manufacturing processes. Rather than drilling a blank and using cutters, buttons, and reamers to machine the chamber and rifling into the barrel, a cold hammer forged barrel is made by forming the barrel around a mandrel that has the rifling inclusions precision ground into it. This process is referred to as “cold” hammer forging because the process is done at room temperature and the metal is not heated.

Weight 58.7 oz
Dimensions 25.7 × 5 × 5 in
Barrel Finish

Nitride / Melonite

Barrel Profile

Government / SOCOM

Gas System Length

Midlength

Barrel Length

13.7

Cartridge Compatibility

5.56 NATO

Twist Rate

1-7

BCG / Charging Handle

Included

UPC 840014620241
P65 Warning Message P65 Warning Message

Compliance

NFA (National Firearms Act) compliance is crucial for legal ownership and transfer of regulated firearms and accessories like short-barreled rifles, suppressors, and certain types of ammunition, ensuring adherence to federal regulations to avoid legal penalties and ensure responsible firearm ownership.

Please select an FFL from the table below, if you do not see your desired FFL, click "Set Later" and you will be able to enter your FFL's information after checkout.

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