Who has broken a bolt with a mid-length gas system?

[Heavy Metal]

Someone did cite that Filth 14 gun above. I'm kind of suprised to see that bolt fail so early.

The first bolt did but the second bolt is over 20K now IIRC.

[KevinB]

Jack, I've heard that KAC has never had a broken Bolt, is this true?

Not true we have broken a ton.

Of course some where into the 40-50k range, auto fire and some suppressed.

I have never seen a KAC 5.56mm E3 bolt fail on a gun in under 20K rounds.

My believe is that under moderate to heavy usage a barrel will be pooched at the 15-20k range, so that at point, having a working bolt is rather moot if you weapon shoots minute of mountain.

[jwfuhrman]

Sitting right at 17,220 rounds thru my Middy SS410 3gun rifle. No issues yet. Its a complete BCM upper and BCM BCG.

[BufordTJustice]

Sitting right at 17,220 rounds thru my Middy SS410 3gun rifle. No issues yet. Its a complete BCM upper and BCM BCG.

Same (BCM) barrel?

How is the accuracy at that round count?

[jwfuhrman]

Same (BCM) barrel?

How is the accuracy at that round count?

Same BCM Barrel I've had for 5 years. Accuracy has opened up, but it's still 3gun accurate. When I can no long hit a Flash Target at 350 repeatedly, then it's time to re barrel.

[Slater]

Pardon the OT question, but how much longer (on average) would the bolt on a 20-inch barrel (rifle length) weapon be expected to last over weapons with shorter barrels?

[pingdork]

One of my BCM middies is over 5k. Nothing broken yet. Come to think of it no failures/jams yet as well.

Please send ammo and I will gladly turn this into a filthy 16/break my bolt test experiment.

[RyanB]

Pardon the OT question, but how much longer (on average) would the bolt on a 20-inch barrel (rifle length) weapon be expected to last over weapons with shorter barrels?

The military has tables on this. I believe it suggested about half again as long.

[Wormydog1724]

Somewhere around 7k of BVAC, Federal, Remington, Red River, Tula, Wolf, and who-knows-what-else on a 16" White Oak Armament midlength, battle comp 1.0, vltor gas block, with Spike's Tactical NiB BCG, Spike's T-2 buffer. Haven't replaced anything and have had exactly zero failures. (had a pmag feedlip break and entered Double Feed City, but not the guns fault).

[AlphaKoncepts]

Once I win the next Powerball (of if that old hag sends me money) I will get another middy and shoot the piss out of it. Unfortunately I have been shooting too much carbine, SBR and rifle stuff.

I can't remember the last time I actually owned a midlength........

Yeah, if I won the powerball I would buy a few barrels of ammo and spend my time researching questions like this. I couldn't think of a more fun learning experience.