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AR 15 Gas Block Removal and Installation
Posted October 18 2010 - 09:36 PM
I am trying to see if anyone has ever done this to their rifle. I want to remove my standard A2 front sight and replace it with a J&T flattop gas block. I am farely competent with rifles and minor gunsmithing and have watched several videos of the procedure, but I would still like to know if anyone else has done it and to give me a realistic difficulty level on the job as a whole. I am also replacing my original forend with a Surefire quadrail and just today added a FAB Defense magwell grip. I already have a Tango down pistol grip on it and it is looking pretty sweet! I will post pictures once the whole transformation is complete.
Thanks for any advice!
Posted A minute ago
Posted October 18 2010 - 09:57 PM
I've removed several. And removing them varies in difficulty. Are you set on using the aftermarket front gas block? Or chopping the original down and using an extended rail? Either way to remove the block start with a larger punch to get the pin to start moving, then move to the correct sized smaller punch to finish the job. I find that just getting the pin to start moving is the hardest part. Once they break free, they move easily. Also most pins are installed right to left. I say most because Stag used to install the pins the other way. Be sure to check before hammering. I use the Brownells block made to support the barrel, but I used a wood block in the past.
Does the new gas block use set screws? If so install it and tighten the screws. Then remove the block and file two small flats for the screw. Some people use a drill press to put a small dimple in the location of the screws. The flats will help keep the screws tight. I have no experience with the clamp on blocks.
Let me know if this helps.
Posted October 18 2010 - 10:12 PM
It can be done though. Make sure you are working on an extremely hard surface (i.e. concrete floor of your garage). A wooden work bench may flex too much. The front sight block from Brownells is helpful, and make sure to use a BFH (big f'ing hammer)
Posted October 18 2010 - 10:19 PM
Posted October 18 2010 - 10:32 PM
Posted October 19 2010 - 05:26 AM
Bushmaster? Oh man, I left out that those have been the toughest for me to remove.
I agree 100%. I've done many Bushy's and I usually have to use a press to get them out.
Posted November 18 2010 - 08:03 PM
I finally got to working on my AR and with the help of my father, a hammer and a brass punch, I was able to remove the A2 gas block. The muzzle break was on so snug, we had to heat it just to shimmy it off. But all in all, I now have a quad rail gas block and a flip down front sight on my AR, next stop: Surefire quad rail already on order.
Posted November 18 2010 - 08:44 PM
Posted November 18 2010 - 09:28 PM
if the muzzle brake was removable then you could have an "assault weapon" problem. A threaded barrel is one of those evil features. you need to permanently attach the muzzle brake to make it legal. Unless of course you dont have a pistol grip and the threaded barrel is your only evil feature
This is assuming you have a post Sept '94 lower...
Posted November 18 2010 - 09:47 PM
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