The two most common failures on the upper are the wearing of the charging handle release notch and the wear of the dust cover notch.
The two most common failures on the upper are the wearing of the charging handle release notch and the wear of the dust cover notch.
My brother saw Deliverance and bought a Bow. I saw Deliverance and bought an AR-15.
I had a hydramatic A2 overstamp in basic and that thing was a rattle box piece of shit. The upper and lower had so much play I tried to tell the DS I need a new rifle. After eating the dirt for evey questioning about something "I dont have a ****ing clue" about, I went on to shoot expert with that POS. Brings back some great and suck fest memories.
Since H&R and GM made rifles, were they disclosed the TDP? :/
I didn't mention it simply because they do not wear out very often. Also, no one here with a few exceptions has the proper gage to check the trigger and hammer pin holes, or knows how to do it.
Also, let's look at simple economics.
Take a lower receiver that costs 100.00. Now let's assume that you have another 80.00 in lower parts installed. That's a total investment of 180.00.
I have said rifle for 8 years and the lower magically gets messed up and needs replacement.
8 years= 96 months. 100.00 lower/96 months= 1.04 a month. So getting spun up over a lower or any other part of the weapon makes no real sense.
In my military time I have seen hundreds of lower receivers that had thousands and thousands of rounds on them and they were stull functioning years later.
Owner/Instructor at Semper Paratus Arms
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Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/
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Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com
Last edited by markm; 12-29-11 at 15:06.
"What would a $2,000 Geissele Super Duty do that a $500 PSA door buster on Black Friday couldn't do?" - Stopsign32v
Was wondering how one measures gas port erosion/rounding off? How do armorers know when to upgrade the buffers from H1 to H2 and H3 to reduce the cyclic rate and increase bolt lock time? Can 2nd echelon armorers perform this task at their maintenance level?
No one does that shit in the army. Well maybe the state/brigade armorers or level 3 shops. They dont **** around with different buffers. They check chamber/barrel/throat and if they pass then it goes back to unit. The only time they mess with anything else is if there is malfunctioning.
The AR-15 is really a simple system and only needs to be tweaked when your using non standard parts (short gas systems,ect) and using quality parts. No one in the army cares about cyclic rate on a M16 or an M4 beacuse we don't use them outside of a small portion of JSOC. If it shoots and feeds well, then its a go.
If you change the bolt you're safest checking the GO dimension and, at least the FIELD. If the barrel was properly headspaced you'll rarely find a bolt that will make it sub-GO later on but it's best to check.
If it's a new build you should check the GO and, at least the FIELD.
You'll have to know beforehand whether you want the chamber to be headspaced to the military or civilian spec, the former can be more reliable, the latter more accurate.
Owner/Instructor at Semper Paratus Arms
Facebook: https://www.facebook.com/SemperParatusArms/
Semper Paratus Arms AR15 Armorer Course http://www.semperparatusarms.com/cou...-registration/
M4C Misc. Training and Course Announcements- http://www.m4carbine.net/forumdisplay.php?f=141
Master Armorer/R&D at SIONICS Weapon Systems- http://sionicsweaponsystems.com
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