16” midlength vs 20” rifle length bolt life

[1168]

Well put.

Almost no one reading this post will ever wear out a bolt or barrel.

Wait. You missed out on all the nitride debates lately, didn’t you.

[derek45]

Almost no one reading this post will ever wear out a bolt or barrel.

Some of us have, and will continue to in the future

. . Courtesy of Mike Dillon & Co.

[CPM]

Calm down, Francis. Almost was the operative word.

[derek45]

Calm down, Francis. Almost was the operative word.

plenty calm, just bragging, . . . I like to shoot.

[CPM]

plenty calm, just bragging, . . . I like to shoot.

Arguably worse.

Again, this post clearly wasn’t meant for you. Also, on the thread that was asking about wearing a barrel or bolt out- a question that by asking it excludes you from the group of people that will- thanks for the brain buster chart explaining how longer has systems reduce pressure and the effect barrel length has on velocity. Simply brilliant. When you have something to add to the OP’s question- if you just want to humble brag about whatever game changing data you’ve collected, fire away.

I shot a fair amount as a grunt in the mid-2000’s at the height of the Surge, both OCONUS and CONUS. I shoot what most laymen would consider to be a serious amount- 5k 5.56, 1k 308, and 10k pistol annually. Granted, it’s not my full time job- I work for a very large medical device company. I have never seen a barrel wear out. Not at the schoolhouse in Georgia. Not burning endless belts training so we didn’t have to account for them. Not with the litany of nationally ranked IDPA/USPSA shooters I shoot with weekly. Shit, Todd H. Doesn’t clean his magnum bolt guns until 4k, when he starts to see accuracy degradation.

You’re in an elite group, dude. But again, this thread isn’t for you, although I’m absolutely positive you won’t be able to refrain from one more unhelpful and self serving post.

[mark5pt56]

Settle down boys, it's Friday.

[derek45]

OP asked about "parts wear".


shorter carbine length gas systems have the bolt unlock sooner, extracting under more pressure.

This puts more stress on the bolt than a middy or rifle length gas tube.

....but yes, most guys won't shoot enough for it to matter.

Happy Friday.

[ViniVidivici]

Moreover, the slightly accelerated parts wear becomes moot if you remain aware, keep a round count, and inspect/replace wear components according to an appropriate maintenance schedule.

[okie]

OP asked about "parts wear".


shorter carbine length gas systems have the bolt unlock sooner, extracting under more pressure.

This puts more stress on the bolt than a middy or rifle length gas tube.

....but yes, most guys won't shoot enough for it to matter.

Happy Friday.

That depends on port size, which depends on barrel length. However, carbine ports erode faster, which has the same effect.

[ta0117]

I understand higher pressure means greater wear on the parts, but it’s not necessarily linear especially when you get above or below certain levels.

I know BCM Filthy-14 broke a bolt at 16k rounds, but then you see bolts like DD or LMT (not the reliability enhanced one) lasting up to 20k on carbine gas M4s. Has anyone actually broken a rifle length M16 bolt?