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Gas Block Woes

1777 Views 11 Replies 6 Participants Last post by  cajungeo
I reported on this forum about six weeks ago that I had tried to disassemble the gas block to install one of the reduced size bushings from Mike Knifong, but couldn't get one of the gas block screws loose. After waiting for the smith to reorder the correct parts (should have done it myself - less time, less cost, less flap, etc.), I finally got the screw head drilled out (two hours, three drill bits - ss is tough stuff!) and the bushing installed. I think the lower surface of the screw head was jammed against the gas block, because after the head was off, the threaded portion of the screw came out very easily.

So, I'm off to the range shortly to see the impacts of the new bushing, new operating rod buffer pad, and a Mike Knifong trigger job.

Cajungeo: Any tips for estimating the 17-25 inch-pounds of torque you recommend for the gas block screws? Without a inch-pound wrench, I torqued them up with a T-handle Allen wrench just past "snug". I did use blue Loc-tite.
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Yes - you can readily find Mini-14 parts on the web. Brownell's and e-gunparts are good sources. As a matter of fact, you can probably build a Mini-14 by buying the individual parts (except maybe the receiver) from these sites, though it might be very expensive.

In regard to the gas block screws, they are staked at the threaded end; probably to preclude loosening rather than to prevent removal. It is easy to break the staking with a little force. I'm of the opinion that the screws are way over-tightened by Ruger. Three of mine came out easily, the fourth (naturally, one under the swivel) would not budge. I tightened the others to make sure the gas block wasn't causing the problem. By the time I gave up, I had "stripped" the inner faces of the Allen head, so that a 9/64" allen wrench couldn't get a grip. I then drilled down through the Allen cap using a 9/64" drill followed by a 5/32" drill, using oil and slow speed. The head came off just before the drill bit contacted the gas block face. To my surprise, the remaining threaded part of the screw came out very easily using vise-grips.
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