Low Profile Gas Block Install

ZigZagZeke

Messages
5,349
Reactions
12,633
OK, so I'm starting to build that Palmetto State 16" kit that I won on NWFA. First order of business is to remove the standard front sight/gas block combo and replace it with a low profile gas block that will not interfere with the optics (tactical scope and red dot combo). To do that I'm going to have to remove the installed flash hider on the end of the barrel. Typically, is that just torqued on, loc-tited, etc? Will I have to heat it? Should I just take it to a gunsmith and pay to have him bugger it? :) Who's a good AR gunsmith in the Eugene area for those times when I'd like someone else to butcher my project?
 

UserNameInUse

Messages
498
Reactions
1,154
Since more the knowledgeable have not answered I'll give it a shot.

Typically there is a crush washer that is there to allow you to align the flash suppressor with the barrel. You should be able to just unscrew it as long as you have a way to hold the upper receiver, but you might need to replace the crush washer with a new one to reinstall it securely.
 

titsonritz

Messages
10,285
Reactions
21,202
There is no toque spec on a standard A2 muzzle device, it is aligned with a crush washer (you will need a new one), it should not be loctited and no need to heat.

The process to remove the FSB is petty straight forward if you have the proper tools, if not you will want to find someone that does or pay an armorer to do the work. Tools needed are:
Solid mounted vise
Barrel vise jaws
Quality Armorers wrench or open end wrench
Hammer
large pin punch (5/16" do it)
(Those hockey puck thing are a joke don't waste your money)

IMO a properly installed low profile gas block should at least be install on a dimpled barrel with knurled set screw and Loctite, pinning is even better and I would steer clear of the clamp type. However on a barrel that already has a FSB installed I would cut it down, remove the sight, bayonet lug and sling swivel mount. The FSB is already pinned so it make for the strong possible gas block.

removebase2_zpseh2mxacz.jpg

For what is worth, I have several A2 front sighted ARs with optics on them and it is not an issue.

 

UPCOMING EVENTS

Albany Rifle & Pistol Club (ARPC) Gun Show 2021 show is cancelled
Linn County Expo Center
3700 Knox Butte Rd E, Albany, OR 97322, USA
22 Rimfire Challenge
Redmond Rod and Gun Club
Redmond, OR 97756, USA
Rimfire Challenge May 8th @ DRRC
Douglas Ridge Rifle Club
27787 OR-224, Eagle Creek, OR 97022, USA

LATEST RESOURCE REVIEWS

  • A Cut Above Pawn
    5.00 star(s)
    Fantastic Customer Service!
    Recently, they helped my lady transfer a pistol to a family member in CA. Most FFLs would have told us to pound sand when we mentioned where we...
  • HighLine Firearms
    5.00 star(s)
    One of the best!
    I have bought from online and in person. Great store, he had things I did not know were needed. I try and recommend Highline Firearms to people I...
  • Copeland Custom Gunworks
    5.00 star(s)
    The only gunsmith I'll use
    Tim has done a few projects for me and the result is always the same. Amazing. End of story. From complete refinish to custom machining, Tim is...
  • Copeland Custom Gunworks
    5.00 star(s)
    great work refinishing my 27 year old 1991 a1 compact colt .45
    Tim did a great job making my gun look brand new again and replacing the old parts inside. Super Happy!!
  • Lucky Sporting Goods
    5.00 star(s)
    Just a transfer but a great one. A+
    Came here today to meet another forum member to buy a Glock. Was the best transfer I've had the pleasure of doing. Even though I was just there...
Top Bottom