New Sharps Relia-Bolt design using S7 tool steel.

[Shao]

If you're talking about the M82 and M107 50BMG rifles, those are massive triangular bolts without the tiny lugs like on the AR15.

Totally different ballgame. The lug root strength on the Barrett is massive. S7 is not an appropriate steel for AR15 bolts.

I think that it has more to do with heat treatment more than anything else. In all of the material data sheets I've found, S7 beats 158 in everything but density (slightly less dense), and toughness (rated the same on some sites, one site only rates 158 as a 9 and S7 an 8, another rates S7's toughness as higher). They can both be treated to the same RC hardness. S7 has far superior wear resistance, hot hardness, lower distortion, higher resistance to cracking, and a much higher resistance to softening.

I'm sure that with the proper heat treat, S7 could make a superior bolt material. The thing is, 158 has been used to make bolts for so long that they've got the heat treat down. It's of my opinion that S7 hasn't been used enough for AR-15 bolts to find an ideal heat treat procedure to be discovered and utilized.

[Tokarev]

Paul Howe is using the Sharps S7 bolt in his new Javelin rifles.

[patriot_man]

I assume the bolts are running well from the lack of updates?

Any high round counts?

[Shao]

I assume the bolts are running well from the lack of updates?

Any high round counts?

I only have about 600 rounds on one of mine. After cleaning the BCG after the last time I shot with it, all looks well. Not exactly a high round count, but... it least it hasn't failed on me!

[hotrodder636]

I am up to about 1200 rounds on mine, about 800 being steel cased and the rest LC M855. No cracking, works well.

[Ned Christiansen]

3.000 as of about September '15 and holding, for about another month.

[MeanCarbine]

Are their BCG gtg?

http://store.srcarms.com/NP3-PLUS-Ba...rcbbcgplus.htm

[hotrodder636]

Haven't read anything bad. The most 'exotic' carrier I have is an LMT enhanced.

Are their BCG gtg?

http://store.srcarms.com/NP3-PLUS-Ba...rcbbcgplus.htm

[Tokarev]

Anyone have any updates?

Sharp's is running a Fourth of July sale right now. Bolts are $20 off.

[vicious_cb]

Just picked up a new NP3 bolt on the cheap to use as a training bolt. Im guessing since people arent bitching online about problems there are no issues with current sharps products?