AR-15 Upper-Receiver Build: Installing the Forward-Assist Assembly

by
posted on September 30, 2015
dsc_0116.jpg

When compared to the amount of work that went into building the 1911, this new project appears much less complicated. Bryce M. Towsley wrote a very informative two-part article in the June and July, 2010 issues of Shooting Illustrated, which fellow Associate Editor, Jay Grazio and I used as a guide for our builds.

The Aero Precision upper I received from Brownells was stripped, meaning it didn’t contain a forward-assist plunger and a dust cover. Those items are contained in a parts kit, which I purchased separately. While some uppers offer them already installed, those that don’t are typically less expensive. Fortunately, putting the parts in yourself isn’t that difficult. The necessary parts and tools are listed below:

Parts

Forward-assist assembly
Forward-assist spring
Forward-assist retainer pin

Tools

3/32-inch roll-pin punch
Brass or plastic hammer

 

Be sure to keep the foreward-assist plunger compressed while you drive the roll pin in place.

Brownells offers several forward-assist assemblies that come ready to install. All you have to do is place the return spring over the pawl and inside the plunger cap, and you are ready to add it to the upper. However, before inserting the forward-assist assembly into its housing on the receiver, start the roll pin that holds it in place.

Once the roll pin is in place, the assembly is locked in and ready for use.

Hold the forward-assist plunger against spring tension while driving the roll pin home. Continue tapping the roll pin with a 3/32-inch roll-pin punch until it’s just past flush to complete installation.

 

Function Check

Push the plunger to make sure the pawl moves forward and returns under spring tension.

 

The next entry will cover installing the dust cover.

 

Latest

cartridge cases
cartridge cases

Solving Issues with Brass Casings

Recently, while shooting a Norinco SKS, I experienced a failure to go into battery. Upon removing the cartridge, I found the round to be “shrouded” by another brass casing.

Handgun Grip Vs. Hold: What's the Difference?

Grip and hold on the firearm are often viewed by handgun shooters as one and the same. However, seasoned defensive and competitive shooters break down handgun shooting stability into two distinctly but equally essential subcomponents: grip versus hold.

First Look: FN America FN 303 Tactical Less Lethal Launcher

New from FN America is the FN 303 Tactical Less Lethal Launcher with a modular chassis system that allows operators and armorers to quickly customize the buttstock, grip or sighting system.

First Look: Diamondback Sidekick Rimfire Revolver

Diamondback Firearms is introducing the Diamondback Sidekick, a 9-shot, single- and double-action rimfire revolver that has an interchangeable swing-out cylinder.

Wilson Combat Unveils Their Latest Expansion

Wilson Combat recently underwent a $10 million upgrade to its facilities, which will help the company keep pace with ever-growing demand. 

Springfield Armory Donates Firearms, Equipment to Lake Ozark PD

Springfield Armory has donated guns and equipment to the city of Lake Ozark (MO) Police Department to ensure its officers can effectively protect and serve the law-abiding citizens in its jurisdiction.

Interests



Get the best of Shooting Illustrated delivered to your inbox.