I'm looking to build an AR up like a Colt 727. I know how to assemble the basic parts of it from past experience with ARs but certain things like the front sight block, rear sight assembly, and buffer tube I haven't tampered with before. My question is should I take the time and effort to learn how to install these myself or due to how green I am should I just leave it up to a proper gunsmith?
Bumping answer my question you homosexuals
right after I fuck ya mudda
>front sight block
requires drilling through a fsb and barrel, its also possible to fuck up by pinning it canted.
honestly not worth it to do yourself just buy a barrel with one already installed
the other 2 you can do yourself with nothing special. might want to buy a castlenut wrench to tighten it properly but one isnt required
This OP, don't install the FSB yourself, just buy a Ballistic Advantage 14.5 m4 cut barrel with the FSB already installed. It's what I did for mine and it turned out great. Buffer tube is piss easy to install, rear sight was a little tricky but nothing I couldn't do with a couple tools and some spare time to kill. Also, if you're not going to SBR it, you'll need to pin and weld the muzzle device, so make sure you know exactly which one you want the first time.
OP here, thanks for the answers anons, once I have finished my rifle I will be sure to post it on some AR related thread like ARG or something.
This thread is now a carbine kino thread, post if you feel like it.
This is exactly the sort of question that should go in either the ARG or QTDDTOT
>ARG
Shithole
>QTDDTOT
Fair but there's no thread up for it rn
you aint wrong
>build an AR
This should be illegal. Only trained people with the government approved need should have mace let alone killing machines. Unless you are just creating an insert display model for a museum or movie production, you should not be allowed to build something so dangerous.
>dude makes an actual gun related thread
>these replies
Shit website.
True /k/ommandos went to the other place, if you know, you know.
wtf are you talking about, i'm right here
>front sight block
You mean installing, including drilling and pinning the FSB on a barrel? This is not something for a rookie.
> rear sight assembly,
Piece of cake.
> buffer tube
Piece of cake.
Your best guide is the -23
http://www.biggerhammer.net/manuals/pdfs/tm9-1005-319-23.pdf
I would just like to say that you have good taste, i did something similar.
> Colt lower
Nice
> fucking colt and their pinned in sear block
> fucking colt and their shaved bayo lug
Fuck Colt
>fucking colt and their shaved bayo lug
easy remedy available, just buy and install a non-F FSB
>fucking colt and their pinned in sear block
An actual fucking problem interfering with installing non-tardspec trigger, thankfully it came with a very nice SS trigger.
lucky digits are lucky
>easy remedy available, just buy and install a non-F FSB
Not easy.
> remove barrel from upper (easy)
> drift out 2 pins holding FSB to barrel (not easy)
> mount FSB (easy)
> mount FSB top dead center (not easy)
> may or may not have to drill new holes for FSB, or worse, holes are slightly misaligned
> install 2 new drift pins for FSB
It's not an easy task.
>> drift out 2 pins holding FSB to barrel (not easy)
How is this not easy? You use a hammer and a punch to knock the pins out, making sure you do it in the correct direction since the pins are tapered. This is hard to fuck up unless you're stupid enough to use the wrong size punch.
>> mount FSB top dead center (not easy)
What's hard about using a level?
The only tricky thing here is if the holes on the FSB happen to be misaligned.
>What's hard about using a level?
Level on what? A barrel is round the fsb isnt flat or uniform and its all going to be sideways as you go into it with a drillpress. Manufacturers have specialized jigs that hold all that shit correctly that you wont have.
Ar fsb arent pressfit to the barrel they are loose enough to rotate on their own.
If its a new fsb there should be no holes in it
If its a used takeoff it will have holes in it that probably wont line up
I never quite understood this. If all the parts are (assuming mil-spec) made to the same dimensions, why would the holes not line up?
I could understand if you had a gas block from a HBAR and tried to put it on a pencil barrel, but lets say you had:
2 barrels
>both 16 inches
>both gov't profile
>both carbine gas
>both F-marked FSBs
>both level at time of installation
and you decided to switch the gas blocks for whatever reason, why would the holes not line up?
>If all the parts are (assuming mil-spec) made to the same dimensions, why would the holes not line up?
there is no spec for fsb hole location
theres a spec for the hole size but really its just drill the fucker. every company does it their own way. i cant find it right now cause google is shit but there was a pic where some guy was selling like 9 takeoff fsbs and the location on all of them was different.
theres a bunch of ar features where there is no spec and it varies by manufacturer. like how much contour is on an ar lower above the pistolgrip or how much flare is in the magwell bevels.
the other thing with blueprints and specs is each defined spec and how tight that tolerance is adds cost. if its in a critical area yeah its important but for something like a fsb where the pin keeps the fsb in place why would it matter.
if you tell them it has to be exactly +/- .00001 on something inconsequential and they fuck it up do you toss out a perfectly good barrel just cause the fsb hole is wrong?
even on take off barrels you see stuff like a hole or half a hole in the barrel cause where they drilled is different.
theres critical areas and theres fuck it close enough left up to manufacturer on milspec. like fire selectors the internal dimensions are important, the external switch design not really.
Buffer tube is easy. Ive never done it but brownells has videos on how to assemble the fsb and rsb. Doesnt look difficult.
>buffer tube
Easy enough, should be like every other carbine AR
>rear sight assembly
I haven't done it myself, but it's not pressure bearing or anything, just find instructions
>Front Sight Base
I would probably get that pre-installed or pay someone to do it.
WYSI
This is not terribly hard to build anon. Draw a witness line on the top of the barrel for when you align the FSB. Also, be sure that you get the correct height of FSB. tapping the FSB pins in can be frustrating but everything else is pretty easy to do. If you aren't particular to the A2 rear sight assembly, consider getting the C7 type upper receiver. You can always use an A2 aperture in it.
https://www.luth-ar.com/product/a1-stripped-upper-receiver-w-m4-feed-ramp/
buffer tube is ez. rear sight is kind of annoying but still doable without much aggravation. front sight requires fixturing and a drill press or preferably a milling machine and you will fuck up your barrel if you try to yolo with a hand drill.