In order to participate in the GunBroker Member forums, you must be logged in with your GunBroker.com account. Click the sign-in button at the top right of the forums page to get connected.

Colt AR15

holeshotholeshot Member Posts: 11 ✭✭
edited December 2001 in Ask the Experts
I'm looking for a Colt AR15 with 20" gov't profile 1-7"twist barrel in either A2 or A4 version. Does anyone know if that combo exists or where to find it?
· Share on FacebookShare on Twitter

Comments

  • holeshotholeshot Member Posts: 11 ✭✭
    edited November -1
    NEED OPINIONS:

    I HAVE AN OPPORTUNITY TO PICK UP A COLT COMP HBAR MATCH TARGET AT WHAT I THINK IS A GOOD PRICE. GUN IS LNIB AND HAS THE 20" HEAVY BARREL AND THE REMOVABLE CARRY HANDLE. PRICE = $750.00. GUN IS A POST BAN. HOW DO THEY SHOOT AND IS THAT A GOOD PRICE? WHAT KIND OF GROUPS WILL IT SHOOT AT 100 YARDS? WITH A GOOD SCOPE. THANKS.

    NO, I'M NOT EXPRESSING ANGER! I TYPE WITH CAPS BECAUSE I ONLY HAVE THE USE OF ONE HAND!
    · Share on FacebookShare on Twitter
  • holeshotholeshot Member Posts: 11 ✭✭
    edited November -1
    Hi have a colt ar15 match target match hbar with serial #CMH0326..ECT. How can i tell if post ban or pre ban gun? Barrel is 20 inch an has screw on flash- w/o lug- also marked cm 556 nato 1/7 HBAR. Plus what model would this be? thanks
    · Share on FacebookShare on Twitter
  • holeshotholeshot Member Posts: 11 ✭✭
    edited November -1
    Can anyone tell me the value of a Colt AR15 accurized rifle/used/24" barrel model number CR6721
    · Share on FacebookShare on Twitter
  • holeshotholeshot Member Posts: 11 ✭✭
    edited November -1
    How does one tell the difference between pre ban and post ban ar15 ?
    Thanks for the help
    · Share on FacebookShare on Twitter
  • BoomerangBoomerang Member Posts: 4,513
    edited November -1
    BTW, that should be a CR-6724 not a CR-6721.New, they can be bought for $1150. Used, depending on how much it has been fired, and if it was fire-lapped correctly, it could be worth $700 to $900. Since correct break-in procedure is the most important factor on value of this rifle, I would make sure to ask the owner how he did it.Boomer
    Protect our Constitutional Rights. [This message has been edited by Boomerang (edited 12-09-2001).]
    · Share on FacebookShare on Twitter
  • holeshotholeshot Member Posts: 11 ✭✭
    edited November -1
    Thanks for your reply. Please explain the process of a break in procedure for the AR15 rifle. I'm not familiar with what your talking about. Thanks Holeshot
    · Share on FacebookShare on Twitter
  • BoomerangBoomerang Member Posts: 4,513
    edited November -1
    Lapping a barrel is when one fires the gun once then cleans it, fires it again once and cleans it, repeat, then fire two rounds, clean it, and repeat; until you get up to about 8 to 10 rounds before cleaning it. Oh well, I think you get the idea that this is a slow process but many feel necessary to obtain the edge on barrel accuracy. BTW, there are many schools of thought on just how best to break-in an AR-15 rifle in order to acheive great accuracy. I suggest you check out AR-15 websites. FYI, this lapping process is only necessary on stainless barrels, it is not necessary on chrome lined barrels. Matter-a-fact, one does not want to clean a chrome lined barrel every time one fires the weapon as this would decrease that barrel's accuracy. This fact is explained on the Bushmaster Website, FAQ section.Boomer
    Protect our Constitutional Rights.
    · Share on FacebookShare on Twitter
  • cpermdcpermd Member Posts: 5,273 ✭✭✭
    edited November -1
    Actually I believe lapping is the use of an abrasive paste run through the bore to smoothe it up.Firelapping is the use of bullets that have an abrasive on themThe shoot and clean and repeat is for SS barrels and is recommended by some and not others.Check the various barrel makers various sites for their recommendations and you will get more confused.cpermd
    · Share on FacebookShare on Twitter
  • JustCJustC Member Posts: 16,056 ✭✭✭
    edited November -1
    gotta agree with cpermd, lapping is the use bullets coated in a "sandpaper" type coating. By going from coarse to fine, this is supposed to smooth all imperfections in the rifling. Be aware that fire lapping has been proven to reduce velocity. The groups will tighten up but the velocity suffers. A minimal amount of throat erosion is the culprit. If you are a benchrest competitor and want the group size with no care about velocity, then do it. If you want an accurate hunting/plinker/paper killer, then don't!!!! To break in a barrel is the process of cleaning the barrel between shots as previously mentioned. The small particles of copper and lead find their way into the tiny pores in the metal and fill them. This seals the barrel in a manner of speaking and creates a more uniform gas pressure flow which is the key to accuracy. All rifles should be broken in this way for maximum accuracy and barrel life. not just an AR. Hope this helps. Take the time to break em in correctly!!!
    · Share on FacebookShare on Twitter
  • JustCJustC Member Posts: 16,056 ✭✭✭
    edited November -1
    Oh yeah, almost forgot, the rifle in VG condition should go for 800-900 bucks if it has been taken care of and not been shot out. $600-700 for good cond.
    · Share on FacebookShare on Twitter
  • BoomerangBoomerang Member Posts: 4,513
    edited November -1
    Sorry, forgot to mention the special abasive buddits you have to use. Also, I meant to say fire-lapping not just lapping. cpermd and JustC are right on the mark.BTW, this is the start of a good thread. Does anyone know if this subject has ever been started before.Like a said previously, there are schools of thought on this subject.Boomer
    Protect our Constitutional Rights.
    · Share on FacebookShare on Twitter
Sign In or Register to comment.