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Thread: New Sharps Relia-Bolt design using S7 tool steel.

  1. #101
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    Tim Lesser, who I had been corresponding with, appears to have left Sharps and is now working for Leupold. Hopefully his replacement will be as eager and as quick to respond as Tim.

    Thanks for your time and help with all the questions, Tim. Best wishes in your new position!

    Sent from my Torque using Tapatalk
    “The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter cannot be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles."

  2. #102
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    Well, metallurgy happens to be one of my hobbies so from what I can tell by looking at the compositions of the two steels is that they could both be very similar if heat treated properly. S7 have FIVE times the carbon content of 158, giving it the potential to be made much harder than 158, which could be a bad or a good thing. It also has molybdenum in it, which 158 doesn't, which would improve ductility and toughness. Corrosion resistance would be close to a toss up since S7 contains chromium, while 158 contains nickel - both good for improving corrosion resistance, although a the higher carbon content of S7 may negate the chromium's effect. I would have to say though, that if properly heat-treated, the S7 bolt has the potential to be much better (based on composition alone). It's also interesting to note that Carpenter 158 was designed as a plastic mold steel, while S7 is a true tool steel. I consider my ARs tools, not plastic molds. Interesting... I may have to buy a relia-bolt to check out.
    Last edited by Shao; 06-15-14 at 09:52.

  3. #103
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    OK, I bit the bullet and ordered a pair of them. Their logic is sound and after extensive research, I do believe that S7 is superior to 158 (Barrett uses it for their bolts so if it can handle .50 BMG, 5.56 would be nothing). When they come in, I've got a brand new WMD and BCM carrier to drop them into for range testing. As soon as I can get out somewhere to shoot, I'll report back with my findings and pics. I think they may have a winner on their hands.
    Last edited by Shao; 07-18-14 at 07:45.

  4. #104
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    Quote Originally Posted by sinlessorrow View Post
    Some more info from Sharps that confirms my thoughts.

    As for your question regarding the omission of an extractor buffer insert: Our rigid functionality testing showed that the addition of an extractor buffer insert added no functional advantage in extraction. Therefore we have chosen not to use them with our high tensile strength spring and rubber donut extractor spring setup.
    This statement is clear evidence that Sharps is clueless as to the dual role of the insert.

  5. #105
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    Quote Originally Posted by MarkG View Post
    This statement is clear evidence that Sharps is clueless as to the dual role of the insert.
    Yep, you don't even need the rubber o-ring unless you are running something extremely overgassed with a proper spring and insert. For the price of a premium bolt they should at least get that right.

  6. #106
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    Well, they are now down to 26 in inventory. I bought one last week, was impressed, just ordered another. As much thought put into this bolt, I also was surprised there was no rubber insert.
    Sounds like most everyone plans to run it like it is for now- is what I'll do. I have a few BCM extractor upgrade kits in the spares box (just in case). If these are as tough as they appear, maybe the bolt body could last the life of the barrel in a middy- I guess we don't really know anything yet.

    I believe the general consensus is that S7 should be more durable than C-158, I wonder how S7 compares to the AerMet steels? I ,too, bought into the hype- I believe it looks to be a winner.

  7. #107
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    So it has the "Crane Ind O-Ring" thing, just not the Black runner Extractor Insert that goes inside the spring?

    I run a 14.5" middy, so I'm not really worried about it, but couldn't people just add one if the gun was over-gassed or they felt they needed it. Tons of makers didn't put it in there for a long time (some probably still don't).

  8. #108
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    I received the Sharps Relia-Bolt a month ago. Mine came with the black insert, and o-ring as well as the 5-coil unknown manufacturer spring. I swapped out the spring for my go-to Sprincos I have (I only run Sprinco 5-coil) and I put the O-ring aside, as none of my carbines use an o-ring. I ran the Relia-bolt in a MK18 this week for over 400 rounds. The bolt ran great, the gun flawless. Upon inspection the bolt was clean and wiped down with a rag upon removal from the carrier. Not that cleaning is a hard task. The only place carbon was stubborn was just behind the gas rings as usual.

    The barrel extension was fine, as I knew it would be. There were no signs of abnormal wear or marks.

    Overall I am very impressed with the new Sharps Relia-bolt design. I look forward to running it for a long time.

  9. #109
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    Almost sold out if anyone is on the fence...

    Sent from my Torque using Tapatalk
    “The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter cannot be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles."

  10. #110
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    Quote Originally Posted by Tokarev View Post
    Almost sold out if anyone is on the fence...

    Sent from my Torque using Tapatalk
    Never mind. They appear to have gotten another batch. I'm glad the price is staying at $80.

    Sent from my Torque using Tapatalk
    “The rifle itself has no moral stature, since it has no will of its own. Naturally, it may be used by evil men for evil purposes, but there are more good men than evil, and while the latter cannot be persuaded to the path of righteousness by propaganda, they can certainly be corrected by good men with rifles."

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