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AR-15 question

concealedG36concealedG36 Member Posts: 3,566 ✭✭
edited September 2002 in General Discussion
I finally got a chance to take the Bushmaster out and it shot great! But, after about 150 rounds I started getting failures to extract the shell casing. I decided that the rifle must have gotten dirty and went home to clean it. During my cleaning I discovered the reason for the problem, the bolt carrier key had come loose. I tightened the allen head screws down, but now I'm worried that it'll loosen up again. Has anybody else had this problem? If so, did you use any type of thread locking compound to keep it from reoccurring?

Thanks,
G36


Gun Control Disarms Victims, NOT Criminals
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Comments

  • concealedG36concealedG36 Member Posts: 3,566 ✭✭
    edited November -1
    I'm thinking of buying a new gun, and somebody told me about the Olympic Arms Plinker Plus. I like the price, because I can't really spend much, because of the holidays approaching fast. Does anybody have any opinions on it?
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  • concealedG36concealedG36 Member Posts: 3,566 ✭✭
    edited November -1
    hey can any one tell me how good or bad a Rock River Shorty Cabine would be for just all around use?
    it has A-2 sights what ever those are? can it be scoped???
    16 inch chrome moly barrel 1 in 9 twist and carbine length handguards with a post ban non collapsible stock,,
    also what should one of these sell for?
    any help is greatly appreciate!!!

    oh as you can tell I don't know much about ar-15 type weapons but have always wanted one thanks
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  • concealedG36concealedG36 Member Posts: 3,566 ✭✭
    edited November -1
    sendra corp/rock island model m15a1?? any good appx value in nra 90% condition. thanks
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  • concealedG36concealedG36 Member Posts: 3,566 ✭✭
    edited November -1
    What are your opinions about C.A.I Centurion AR's? They seem to be selling for less than others out there. Is it as simple as "you get what you pay for?" If thats true is Colt really worth the extra 4-600 bucks they seem to get?

    I'm beginning to think that an AR is an AR is an AR. Just get a receiver and build yer own.
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  • concealedG36concealedG36 Member Posts: 3,566 ✭✭
    edited November -1
    Is there any good reason why one should/should not try for a set up on a flat top ar15 that allowed the simultaneus use of a scope and iron sights. My thinking was what if you dropped you gun on its scope and now its a paperweight and the varmint you want to shoot is right there in from of you.

    Has anyone tried that? Is it common uncommon?
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  • concealedG36concealedG36 Member Posts: 3,566 ✭✭
    edited November -1
    Any one have any experience with Essential Arms brand AR? There is one listed in the local paper for $650 and was thinking of checking it out if they decent.
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  • concealedG36concealedG36 Member Posts: 3,566 ✭✭
    edited November -1
    Does a free float handguard worth the time & $ ? And how much acc. improvment can one expect ? Is it really worth it ? My upper is bushy A2 heavy ,full rail hanguard and standard front sight .
    Thx in advance !
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  • concealedG36concealedG36 Member Posts: 3,566 ✭✭
    edited November -1
    I've got a post ban lower and a 7" barrel to go with it.
    Should I, Can I, Or do I have to register the lower as a SAW pistol, or a SBR??? Anyone here have a a thought???
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  • concealedG36concealedG36 Member Posts: 3,566 ✭✭
    edited November -1
    a small portion of each paycheck is going to be set aside for the purchase of an Ar-15. I know there are a myriad of makers and accessories, but what all calibers are available as well?
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  • gundawggundawg Member Posts: 32 ✭✭
    edited November -1
    take a center punch & peen the carrier key in 3 spots around each screw head. that should have been done at the factory. you don't want to mushroom it too much, just enough to prevent the screws from working their way loose.
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  • Matt45Matt45 Member Posts: 3,185
    edited November -1
    G-36-

    This is a new Bushmaster, right?? Why run afoul of the service department by peening the bolt yourself? Send it back to them! Make the manufacter fix it!

    You can contact Bushmaster Cust. service here-http://www.bushmaster.com/documents/customer.htm




    Reserving my Right to Arm Bears!!!!
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  • concealedG36concealedG36 Member Posts: 3,566 ✭✭
    edited November -1
    Thanks guys. I'll take a look and see if the carrier key has the indents. I don't think it does. If not, I'll call Bushmaster.

    I appreciate the help.

    G36



    Gun Control Disarms Victims, NOT Criminals
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  • mark christianmark christian Member Posts: 24,443 ✭✭✭✭
    edited November -1
    G36, Matt is absolutely right, this should have been done at the factory! The AR-15 carrier key was designed to be heavily staked in place in two spots, 12 and 6 o'clock. There should be no gap or movement what so ever between the key and the bolt carrier. Generaly you need to grind off the rear of the key around the screws in order to free them. They are hammered!
    I'm guessing that gundawg spent some time in the service or knows an armorer because his suggestion is the correct field method for replacing a new key onto an old carrier; you peen it three times. Not too many people outside the military or police armories know this, so I'm impressed!
    Your use of industrial threadlocker ("LOCKTITE") will solve nothing because that product is not designed to operate in that type of enviorment. The screws will eventualy come loose again at some point and the tread locker which remains will bind the screws making it nearly impossible to remove the key. If you are fitting your own screws back into the carrier the correct torque is 35 to 40 inch
    pounds. If you do this yourself you'll need an 1/8" hex wrench and someway to measure the correct torque level. You should always use new screws and when you peen them, specs call for no more than a .025 inch protrusion above the top of the key flat. Can you do this at home? Do you have the correct tools? Can you measure that small of a distance? Frankly I doubt it! Send the bolt carrier back to Bushmaster and have them make it right!



    "Trust me, I know what I'm doing!"



    Mark T. Christian

    Edited by - mark christian on 09/09/2002 20:39:12
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  • Josey1Josey1 Member Posts: 9,598 ✭✭
    edited November -1
    The peening mthod also works well for loose dovetail sights.

    "If cowardly and dishonorable men sometimes shoot unarmed men with army pistols or guns, the evil must be prevented by the penitentiary and gallows, and not by a general deprivation of a constitutional privilege." - Arkansas Supreme Court, 1878
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