How to assemble Mil Spec/free float barrels on an AR-15 rifle

Follow some expert gunsmiths at Brownells as they walk you through simple procedures for customizing, repairing, and maintaining your firearms. This weapons video tutorial series will teach you how to assemble Mil Spec and free float barrels on your own AR-15 rifle.

The AR-15 is one of the most adaptable rifle platforms in history, and building one is easier than you think. Brownells has produced a comprehensive series of easy to use web based video instructions on assembling an AR-15. They cover the all the parts, variations, subassemblies, tools and complete building of the rifle so you can feel confident to tackle this project on your own.

Broken down into short easy to follow video instructions for each step, you’ll be able to watch only those segments that pertain to your rifle and not be bogged down with a lot of extra details.

This section is broken down into two major types of handguards: standard and free floating. The standard handguard clips will show you how to: assemble the delta ring, install the barrel, align the gas tube, install your handguards, flash hider or muzzle break, the front sight and the rivet mounted sling swivel.

The free float handguards clips will show: installing the barrel, aligning the gas tube, installing your handguards, and installing either an aftermarket gas block or a mil spec front sight base.

1. Assembling the Mil Spec Barrel Overview
2. Installing the Delta Ring Assembly & the Barrel Into the Upper Receiver
3. Installing a Flash Hider or Muzzle Break
4. Installing the Front Sight & Sling Swivel
5. Assembling a Free Float Barrel Overview
6. Installing Free Float Handguards & an Aftermarket Picatinny Rail Gas Block
7. Installing Free Float Handguards with a Standard Front Sight Base

Search "AR-15" and start building, parts knowledge, get the right tools, upper receiver, charging handles, lower receiver, fixed buttstock and functions check on WonderHowTo to see more about building an AR15 gun.