|
||||||||||||||||||||||||||||||||||||||
why does acceptance rate matter?
if they say that barrels have 50% failure rates... who cares. as long as you're in the 50% good barrel.
www.cpra.ph
Cebu Pistol and Rifle Association
There seems to be an influx of "Tier" speak recently.
The whole "Tier" designation is flawed from the outset, thus the preference here for the comparison chart and observed failures.
Funny thing, the guns that are the most likely to fail in high volume training are the ones with the lowest quality of components and least amount of testing of those components.
Hmmm.
By that do you mean companies that properly test their parts like Colt or BCM, or companies that batch test like DPMS and RRA?
I see where tylerw02 is going with this and I would like to find out myself if for nothing more than to satisfy my curiosity, but on the other hand as long as you buy tested parts what does it matter?
I like girl scout cookies.
then don't buy from companies that allow defects.
if that is your statement then the issue is not about defect rate but company reliability.
www.cpra.ph
Cebu Pistol and Rifle Association
That is absolutely true. But what are the accept/reject thresholds? They can test all they want without saying where something is too low quality to be accepted. For instance, will BCM and Colt reject exactly the same part or do they accept different levels of variance? Or are we to assume a bolt from Colt=BCM=Daniel Defense?
Once again, because something isn't individually tested, we cannot know for sure if it would or wouldn't pass tests; therefore the rejection rate could be useful to know the likelihood an untested part is flawed. The SWAG guesstimate given above of 0.3% would suggest that three in 1,000 would fail the test. Then one must consider how often the part would fail even if it doesn't meet spec.
That also brings up a good question, of parts failures, how common is it that shot peen, MPI, or HPT would have prevented the failure as opposed to the problem being from something such as the wrong extractor spring/insert, poor staking, .223 chamber as opposed to 5.56, or the wrong buffer? How common is it for barrels to fail? This type of stuff could be very useful to new guys to help them determine WHAT is most important and to know the likelihood of failures of different examples of AR15s. I didn't start this thread to convince people to use inferior parts or to allow apologies for lower tier AR15s; rather to expose what corners being cut will cost the user more reliability and function. What compromises can and cannot be made for the budget-conscious shooter.
Last edited by tylerw02; 07-21-09 at 02:22.
I often wonder what happens to parts that don't pass inspection, but appear cosmetically good.
Are "fail" parts returned to the manufacturer, thrown in the trash, other?
Bookmarks