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SA Reciever factory blems at Brownells

Pat C.

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If its just bad hole , simple carbide center drill to open it up and weld fill/dress. Re-drill tap .Heat paste applied around area will stop heat transfer and usually keep finish from changing,except for right around hole.
 

V guy

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The hole is near the outer recoil lug....welding not advised. Tempering begins as low as 350*.

Drill hole bigger, tap for a screw in plug, set plug with red locktite; plug already drilled/tapped for the scope mount screw, would work better.....can be done on a lathe...........not a lot of torque on that screw.

Cheaper WECSOG--fill hole with JB weld, drill and tap for scope mt screw on mill. Must be square to receiver centerline.

Cheaper yet..get a quality scope mount, fill receiver hole with JB Weld, coat screw and mount surfaces and screw, with release agent.......clamp mount and screw to receiver, keep JB Weld fully centered around screw...........JB does not run, can be fixed up later on, too, and redo's a snap.

My choice.
 
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Pat C.

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Thats what heat paste is for , I can pack heat paste all around lug area and you could put your hand on ring and never get hot.Clamp a copper block in bolt race way to create dam and use as heat sink.

This kind of work has been done for years on hardened bolt gun receivers.
Anneal the scope base hole locations prior to drilling/tapping.

Your not going to tap that case hardened receiver unless it's been spot annealed or its not to USGI case specs.
Cobalt tap might if its on low end HRC
 

V guy

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JB Weld is used to fix cracked engine blocks. Would be quite hard enough for that low torque location, a 5/16+ hole. No annealing required.

Pressing in an equal size bushing, kept in a freezer, and pressed in, faced off, drilled, tapped might also work.

Annealing, welding, machining, drilling tapping seems to be a lot of work for a receiver that will always be kept in the SA records, as a blem.
 
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