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Me too. I see/do an eff-ton of live-fire with both the M16A2/A4 and the M4(A1), and I’ve seen bolt lugs break in the M4, but never in the very tired M16’s. Anecdotes and all. Maybe I need to start hanging around more when they clean them, or talk to the armorers later. Perhaps I’m just not noticing it.Originally Posted by lysander
RLTW
“What’s New” button, but without GD: https://www.m4carbine.net/search.php...new&exclude=60 , courtesy of ST911.
Disclosure: I am affiliated PRN with a tactical training center, but I speak only for myself. I have no idea what we sell, other than CLP and training. I receive no income from sale of hard goods.
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I’ve never seen that type of breakage in person, but the internet contains these stories. I would hypothesize that its because of the differences in a .gov M4 and whatever Bushmaster or PSA are doing.
RLTW
“What’s New” button, but without GD: https://www.m4carbine.net/search.php...new&exclude=60 , courtesy of ST911.
Disclosure: I am affiliated PRN with a tactical training center, but I speak only for myself. I have no idea what we sell, other than CLP and training. I receive no income from sale of hard goods.
Senior Member
That's a pretty big advertisement for Colt right there, considering you can get them for about half the price of the LMT. I think the price of the lobster tail extractors is the biggest drawback. It doesn't do much good to have a bolt that lasts forever when it takes proprietary extractors that cost sixty dollars each.
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Looks like Colt changed something in the heat treating process that caused the c158 bolts to brake in half. Not sure what that was because the bolts are mostly unchanged since the late 60's
You won't outvote the corruption.
Sic Semper Tyrannis
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Are you surmising this or is it documented somewhere? Not being a dick, just caught my attention so I was wondering where the source came from.
11C2P '83-'87
Airborne Infantry
F**k China!
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No worries. Isn't that what Chris said in the video?
You won't outvote the corruption.
Sic Semper Tyrannis
Senior Member
I assume sarcasm....
I would say the fact that web cracking occurs to some extent in the civilian world and not mentioned in Army reports indicates:
1) it occurs with equal frequency in both civilian and military rifles, but to an extent low enough that the military does not consider it a problem, but the internet makes it appear it is big problem in civilian rifles,
2) it occurs in civilian more frequently and indicates a fundamental difference between civilian and military rifles, such as being in an over gassed condition, or
3) there is a difference between bolts sold to the military and some of those sold on the civilian market.
Pick one, or all....
Last edited by lysander; 11-03-19 at 18:57.
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Yeah, all three. Plus some civvies are also putting a considerably higher round count in their rifles than, say, an infantry unit (not talking support units). Not HSLD units mind you, but an average grunt unit, per weapon.
That said, as far as the Army is concerned M855A1 and it's higher pressures have been in general issue for quite some time now. That will no doubt have an effect on bolt life.
11C2P '83-'87
Airborne Infantry
F**k China!
Senior Member
Buy an SR-15 and never worry about bolt life again.
Senior Member
Although it would be less attractive to the civilian market, because it is not a visible change to the outward appearance of the bolt, Low Plasticity Burnishing could easily double bolt life.
I wonder how much it would add to production cost.
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