I have a Vector V-51 pistol  and I would like to put a vertical hand grip on it , if I register it as a AOW , will it cost $5.00 ?? or $200 and do I have to have to my BS address engraved or is there some other , professional method or company I have a bad address,that I would rather forget when I move

$5.00 fee.

BS address must be engraved.

I thought it cost $200 to make an AOW, but only $5 to transfer one...?

From Bardwell's stuff on titleii.com"  www.titleii.com/BardwellOLD/nfa_faq.txt

Owning or making an NFA weapon

   It is illegal for anyone to have possession of an NFA weapon that
is not registered to them in the NFA Registry.  It is also not
possible for anyone, except government entities, to register an
existing NFA weapon that is not registered, except within 24 hours
after one is made by a class 2 NFA manufacturer.  An individual
otherwise able to own any gun under federal law can receive and own
any NFA weapon (local law permitting, ATF cannot approve a transfer
where federal, state or local law would be violated by the
transferee possessing the weapon in question, see 26 U.S.C. sec.
5812(a)(6)) on a Form 4, "Application for Tax Paid Transfer and
Registration of Firearm".  Non-FFL holders may only purchase an NFA
weapon from a dealer or individual within their own state. If the
weapon is located out of state it must be transferred to a class 3
dealer within the state, before transfer to the non FFL purchaser.
C&R FFL holders (type 03) may purchase C&R NFA guns from out of
state dealers and individuals.  Type 01 FFL holders, who are not
qualified to deal in nFA weapons, that is are not SOT taxpayers
(see below) may purchase any fully transferrable (no dealer
samples, see below) NFA weapon, from an out of state source. If the
FFL holder is an individual he must submit fingerprints,
photograph, and the law enforcement certification.

   The transfer involves paying the transfer tax, which is $200 for
all the NFA weapons, except AOW's for which the tax is a mere $5.
Individuals also have to get one of several specified local chief
law enforcement officers to sign the form (see below on the law
enforcement certification for more information), submit their
fingerprints in duplicate, and attach photos of the transferee to
the form.  While the transfer tax is levied by law on the
transferor (seller), in practice the transferee (buyer) is expected
to pay the tax.  Initial transfers to individuals tend to take at
least 4 months, although subsequent transfers can be quicker.

   Or you can make any NFA weapon, except for machine guns (see
below), by filing ATF Form 1, "Application to Make and Register a
Firearm", and paying the $200 making tax, which applies to all of
these weapons, including AOW's.  You may not make the proposed
weapon until the Form 1 is returned to you approved.  The law
enforcement certification, photos and fingerprints also apply to
Form 1's, and in fact to any transfer to an individual.
Additionally the manufacturer of any NFA weapon, including an
individual making one on a Form 1 must mark the receiver of the
weapon with the maker's name and city and state.  NFA Branch can
grant exemptions from this for DD's.  All types of corporations,
including corporate type 01 FFL holders, need not do the
certification, photo and fingerprint requirements.  Any of the
forms listed, and the fingerprint cards, are available for free
from ATF, either in Washington, D.C. or your local office.

Quoted: I thought it cost $200 to make an AOW, but only $5 to transfer one...? From Bardwell's stuff on titleii.com"  www.titleii.com/BardwellOLD/nfa_faq.txt Owning or making an NFA weapon    It is illegal for anyone to have possession of an NFA weapon that is not registered to them in the NFA Registry.  It is also not possible for anyone, except government entities, to register an existing NFA weapon that is not registered, except within 24 hours after one is made by a class 2 NFA manufacturer.  An individual otherwise able to own any gun under federal law can receive and own any NFA weapon (local law permitting, ATF cannot approve a transfer where federal, state or local law would be violated by the transferee possessing the weapon in question, see 26 U.S.C. sec. 5812(a)(6)) on a Form 4, "Application for Tax Paid Transfer and Registration of Firearm".  Non-FFL holders may only purchase an NFA weapon from a dealer or individual within their own state. If the weapon is located out of state it must be transferred to a class 3 dealer within the state, before transfer to the non FFL purchaser. C&R FFL holders (type 03) may purchase C&R NFA guns from out of state dealers and individuals.  Type 01 FFL holders, who are not qualified to deal in nFA weapons, that is are not SOT taxpayers (see below) may purchase any fully transferrable (no dealer samples, see below) NFA weapon, from an out of state source. If the FFL holder is an individual he must submit fingerprints, photograph, and the law enforcement certification.    The transfer involves paying the transfer tax, which is $200 for all the NFA weapons, except AOW's for which the tax is a mere $5. Individuals also have to get one of several specified local chief law enforcement officers to sign the form (see below on the law enforcement certification for more information), submit their fingerprints in duplicate, and attach photos of the transferee to the form.  While the transfer tax is levied by law on the transferor (seller), in practice the transferee (buyer) is expected to pay the tax.  Initial transfers to individuals tend to take at least 4 months, although subsequent transfers can be quicker.    Or you can make any NFA weapon, except for machine guns (see below), by filing ATF Form 1, "Application to Make and Register a Firearm", and paying the $200 making tax, which applies to all of these weapons, including AOW's.  You may not make the proposed weapon until the Form 1 is returned to you approved.  The law enforcement certification, photos and fingerprints also apply to Form 1's, and in fact to any transfer to an individual. Additionally the manufacturer of any NFA weapon, including an individual making one on a Form 1 must mark the receiver of the weapon with the maker's name and city and state.  NFA Branch can grant exemptions from this for DD's.  All types of corporations, including corporate type 01 FFL holders, need not do the certification, photo and fingerprint requirements.  Any of the forms listed, and the fingerprint cards, are available for free from ATF, either in Washington, D.C. or your local office.

Correct $200 on the form 1 to make an AOW , $5 to xfer. You should register it as a SBR , not an AOW since SBR gives you a ton more options

Quoted: I thought it cost $200 to make an AOW, but only $5 to transfer one...?

You are correct, I read it wrong.

thanks , now I got it SBR is the way to go might as well be able to put a stock on it too for $200 tax  

You got it!

The only advantage to an AOW, is that it would be a little easier to sell.... $5 transfer versus $200.

If you intend to keep it, by all means SBR!

as iunderstand you can have a class II weapons manufacturer (ORF, etc...) build it for you and pay  for the work which will cerainly be less than $200 and then pay the $5 to have it transferd to you.
-jls7

Quoted: The other advantage to AOW is ability to transport across state lines without ATF prior permision.

I didn't know that!  Same for sound suppressors too, I'm told.