Help replacing AR 15 Handguard

To replace the handguards, place the buttstock on the floor and grasp the rubber ring at the rear of the hanguards. Pull down on the ring (spring loaded) and slip the handguards down and out. It's a lot easier with an extra set of hands!
 
here is my trick

you really need a third hand to pop off the cover while pressing the snap ring down on both sides,
so i hook an L shaped piece of wire in the vent hole & use my teeth to pull the guard out far enough to grasp.

works for me
 
When I first bought my new Bushmaster last year, one of the very first things I did was strip it down to inspect it (mostly to marvel at it). Taking the handguards off was a mistake I will not repeat. It took my wife helping me for 30 minutes to get those things back on.
 
There is a trick. When I first bought an AR-15, It was very difficult for me. At a qualification course, an instructor taught me how to do it. Can't explain, but you only pry one side down at a time. Easier that way. Otherwise, use three hands as other's have suggested.
 
After you get the handguards off, then proceed to remove the muzzle brake or flash suppressor. Then, drive out the two pins holding the sight assembly, from left to right. Remove the sight assembly and gas tube. Using a barrel nut wrench, remove the barrel nut.

Replace the barrel nut with the barrel nut piece of a two-piece, DPMS free-float tube. Reassemble other parts. Shoot better.
 
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