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ARGH!!!!! AR build help!!!!

Discussion in 'General Firearm Discussion' started by JeremyK, Mar 10, 2014.

  1. JeremyK

    JeremyK Milwaukie Professional BA

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    Ok so... where to start... I ordered a few things from Del-ton with my tax return this year, namely a AR15 BCG, charging handle, and 20" pre-ban barrel kit. The package took about two weeks (from what I've read, is pretty standard Del-Ton) and it arrived today. Everything is in good order and all of the below discrepancies are my fault mainly due to my lack understanding of the subject (being fairly new to the AR building thing). So here are my problems:

    1. As it was "Pre-Ban" I thought that meant that the A2 front sight base would include a sling mount and bayonet lug (pre-ban barrel kit pic on DT's site showed a bayo lug on the FSB). The FSB that came with my package has the sling mount, but not a bayo lug. Am I confused on the whole pre-ban/post-ban jargon?
    2. The kit came with taper pins, but neither the FSB nor the barrel are drilled for them. Not sure if that is my goof or DT's, but I feel that should have been mentioned in the site's description of the contents of the kit. Is there anyone who knows a gunsmith that can drill a barrel/FSB to accommodate the included taper pins? Tried Curt's (talked to Curt directly) and he said they only have the ability to drill and screw the FSB into the barrel.
    3. And speaking of front sight bases, the AR build I am working on has the flat top upper receiver, with the removable carry handle rear sights (I'm wanting the rifle to be set up just like the M16A4 I was issued at basic training, too bad it'll be sans three shot burst) and I'm confused about the "F" marked FSB. Here is a copied and pasted description of the difference between the standard A2 FSB and the "F" marked one: "NOTE: F-Marked Front Sight Base is not compatible with an A2 Upper due to height compatibility, therefore if you choose an A2 Upper and want a standard front sight base you need to choose the Standard A2 Front Sight Base." So does that mean that a standard A2 FSB won't work with the flat top reciever/carry handle sight assembly? Would that mean I would have to find an F marked FSB with bayo lug to keep my rifle as close to mil-spec as possible and to be compatible with the flat top/removable carry handle combo?

    Any help/advice would be GREATLY appreciated. Thanks guys!
     
  2. erudne

    erudne The Pie Matrix PPL Say Sleeping W/Your Rifle Is A bad Thing? Bronze Supporter

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    I think I understand your situation. I would slap it all together, clean it, lube it and take it to the range. Dial the rear sight to highest setting and see where it hits at 50 yards, if it hits low dial the rear sight down until it hits the X ring then move out to 100 yards, do not be surprised if it hits very high @100. re dial the zero till it is 2" high @100 yards
    Now you have a rifle you can fight with
    you can worry about the bayonet later (duct tape)
     
  3. JeremyK

    JeremyK Milwaukie Professional BA

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    Yeah, I'm thinking I'll probably just spend the extra $30 on an F marked fsb with bayonet lug and hopefully find a gunsmith that can drill it for the taper pins
     
  4. solv3nt

    solv3nt Portland Well-Known Member

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    Curt's Discount Shooters in Milwaukie
     
  5. JeremyK

    JeremyK Milwaukie Professional BA

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    Tried that, they aren't able to drill for the taper pins
     
  6. rick benjamin

    rick benjamin USA, Or, Damascus Secure the drama Silver Supporter 2016 Volunteer

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    Hi Jeremy
    Don't stress out, you are close to finishing.
    Come over, I'm on 222nd, or I can come to you
    Rick in Damascus
    503.310.3931
     
    POSOG and Sgt Nambu like this.
  7. rick benjamin

    rick benjamin USA, Or, Damascus Secure the drama Silver Supporter 2016 Volunteer

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    pre-ban 20"barrel specs
    1.
    Expected A2 FSB would include sling mount and bayonet lug.
    FSB that came with my package has the sling mount, but not a bayo lug.
    Post-Ban FSB
    2.
    The kit came with taper pins. FSB, barrel not drilled for them.
    Post-Ban barrel and FSB
    3.
    I'm confused about the "F" marked FSB.
    F-marked FSB is 0.040" taller than standard.
     
    Last edited: Mar 11, 2014
  8. JeremyK

    JeremyK Milwaukie Professional BA

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    Thanks Rick, just checked DT's sight, they DID send me the wrong barrel kit, will contact them tomorrow.
    I owe you some .22 long ;)
     
  9. rick benjamin

    rick benjamin USA, Or, Damascus Secure the drama Silver Supporter 2016 Volunteer

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    Jeremy called, I enjoyed the conversation very much!
    He asked my opinion!
    I suggested if DelTon can't make it work for him, he return the barrel kit for his $.
    (the kit was a mix of pre and post parts)
     
    Sgt Nambu likes this.
  10. Sgt Nambu

    Sgt Nambu Oregon Bronze Supporter Bronze Supporter

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  11. gryghin

    gryghin Beaverton Active Member

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    This is an example why NWFA forum is the best. Glad you were able to get the help you needed as well as guidance on possible choices.
     
  12. cookie

    cookie THE SOCIALIST STATE OF KALI - FORNIA Well-Known Member

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    Go to Ar15 .com and M4 carbine.net and study up ! They have have the info you need. For example the front sight bases that are to be drilled don't come drilled you need a mill and a jig. And they explain the front sights etc lots of info so take the time!!!