with lugs broke off.
![[b]Del-Ton Bolt[/b]](http://i89.photobucket.com/albums/k229/usmcmonty/imagejpeg952.jpg){kind=link}
Found this on “another site” (link IS NOT to "another site’ but to pic only).
Something to think about. ‘AP’(Armscorp ?)head stamp ammo. This was said to be an issue known to Del-Ton and they have dealt with it.
I can honestly say that I have never see ALL the lugs break off. New one on me.
C4
Like to know story because the extractor broke too…
Armscor the Philippino company?
I just went there to find the thread. fffuuuuu all that cancer…
Was this one of those new Del-Ton bolts that has “HP MP” laser etched onto it?
Shady.
That was some brittle steel. Heat treating problem?
Edit: Read the thread on TOS, and apparently, it all the “Chart’s” fault. I guess QC is a snobbish endeavour. Nevermind…
I would assume it was ‘Armscor’ but the other thread said “Armscorp”.
Apparently, Del-Ton use an MPI/HP tested bolt now and has replaced ones that failed. This bolt was not one of the new bolts according to the story.
After reading that whole thread all I can say is…
Man, am I glad this forum exists!
Quotes for Truth my friend.
I was speaking with Grant this weekend and was telling him exactly this. God it makes my head hurt to read over there sometimes.
The only thing it’s good for is HTF & the EE.:laugh:
That bolt/barrel had 200 rounds through it according to the OP.
With that little of rounds down the barrel, would it be feasible that a proper HPT & MPT would have rejected this bolt?
How much pressure is behind one of those HPT rounds?
I think I read somewhere that the HPT round is in the neighborhood of 120% of the max allowable pressure?
And seriously - what is all that shit in the gas key???
If you still use shitty materials to make a bolt, you’re still turning out a sub par product despite HP/MP testing it.
High presser test cartridge M197 is listed at 70,000 psi.
This is a good illustration that not all parts are the same.
The guy obviously has not taken the time to educate himself. He has no clue who did the research for the chart and the only thing he can call out as an issue, is that Spikes is not on the old version. Typical Spikes customer on TOS.
This would be more than 2 times the max pressure. NATO proof loads run about 50% higher than a 5.56 NATO load.
Very similar looking to this: kB on a piston gun.
Here’s a link to the gallery.
https://www.dropbox.com/gallery/10832282/1//Upper%20Disaster?h=12701c&
Hornady states on their website that the NATO cartridge runs “approximately 58,000 psi.” If the HP test cartridge is 70,000 psi, that’s 120% of the NATO norm (or 20% higher).
The chart bashing over there is hilarity, but unfortunately it makes you dumber for having read it. Stay away.
I bet the user who had this faulty bolt thought he was getting a great deal by purchasing a cheaper bolt that wasn’t MPI’d for about $20 less than a known good bolt. Not only was this a dangerous decision, but now he’s out another $55-$70 and will probably have to do repairs to his rifle.
There are all kinds of crazy issues with that gun… I’m sure that it being a piston just made those issues worse.
The barrel extension has M-4 feed ramps, but the upper receiver doesn’t. The hammer appears to be made out of some kind of polymer or composite. And that bolt is JACKED!
Not only that, it appears the user was wearing glasses that had a high-end Italian frame - obviously he can afford to do better, but for some reason he opted to go with cheap.
I actually took the time to read the thread over there…
:suicide: