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AR15 Question

RobOz
I have a fellow who wants to trade an AR for another item I have and has given me the description below. He has two AR's for trade, but I really don't know what 6.8 SPC is, or stands for.

"I've got one in 6.8 SPC and one in 5.56/.223."

I already have an HBAR Colt, but would not mind having another to shoot, I just want to understand the difference.


EDIT:

I did a search on 6.8 in the forum. Disregard my inquiry.



EDIT II
Armalite,
Thanks for the description. Now, I need to decide if I should trade for the 6.8 or the 5.56. Since I akready have the 5.56 in the HBAR model, I may make the trade for the 6.8. Who knows, the ammo looks pricey and it may be just another "gimick" like the 45GAP. A round that may be harder to get as time goes on.
Thanks,

Aaron
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Comments

7 comments

Date Votes
  • RobOz
    AM CONSIDERING THE PURCHASE OF AN AR15 ,LOOKING AT OLYMPIC ARMS 223 PLINKER AND ARMALITE M15 A4 FLAT TOP. THE OLYMPIC IS ABOUT 250.00 CHEEPER,,IS IT WORTH THE SAVINGS? DO THEY BOTH ACCEPT STANDARD AR15 ACCESSORIES ,CLIPS,SIGHTS,FURNITURE ETC. THANKS,,,,,

    RONK7716@CS.COM
    0
  • iceracerx
    Reloads? Factory ammo? Surplus?

    Might need a lighter recoil spring or it might just need some lube.

    Sounds like the bolt is not traveling far enough rearward to pick up the next round.
    0
  • charliemeyer007
    Are you fully seating the magazines? Look at the magazine release. Do you seat the ammo to the rear surface in the magazine but smacking it on the backside with the heal of your hand?
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  • RobOz
    I think I'll give it a real good cleaning and lube. I know it's not the hand-loads, I have fired at least 300 from the batch.
    0
  • tsr1965
    One thing you want to look at, is if it has a pinned on gas block, or one secured by set screws. If the latter, they can become loose, and the gas block move, restricting your gas flow. For the most part, those set screws are red Loctited in, but we all know, heat will soften it. Had it happen several times on a friends AR-10 that he purchased as a rifle that was "CUSTOM" built from an array of parts. Of course they were assembled by BUBBA.

    Best
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  • azpowerwagon
    Outside of the obvious, a good cleaning may help. Don't forget a good blast of brake cleaner down the gas tube. Check that the key on the carrier is not loose. If it functioned previously with the correct springs, do not change them.
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  • asphalt cowboy
    quote:Originally posted by azpowerwagon
    If it functioned previously with the correct springs, do not change them.


    +1

    As was mentioned check for loose carrier key and gas block.
    Also look at the end of, and inside, the key for odd wear or damage. Check the rear of the gas tube also. A misaligned key or tube with damage/wear wont seal properly.
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