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Jarhead
09-08-2010, 1:01 PM
I have an Eagle Arms and Olympic Arms Pre-Ban AR-15, I want to replace the carrying handle uppers with Tactical Machine Flat Top Uppers plus remove Front Sites and replace with Gas Blocks. Any Concerns? Tips?

dieselpower
09-08-2010, 1:25 PM
Do you have a strong work table?
Do you have a large vise?
Do you have a clam-shell upper block?
Do you have a large 3/8 or 1/2 drive torque wrench?
Do you have a AR15 barrel wrench?
Do you have large Slip-ring pliers?
Do you have a pin punch set?
Can you take your time, understanding rushing a job causes more lost time then waiting to do it right?

What is the length of the barrel?
How is the muzzle device attached?

coq
09-08-2010, 1:35 PM
Did you consider purchasing or building a new complete upper?

NewbieDave
09-08-2010, 1:42 PM
If you don't have the know-how and the tools already... easier to get a new upper and sell your existing one on the forum.


~dpc

drs2714
09-08-2010, 1:51 PM
LOCATION?

DSA_FAL
09-08-2010, 1:56 PM
Either buy a new upper or get a gunsmith to do the change out if you dont already have all the tools.

ocabj
09-08-2010, 2:05 PM
Even with the tools and know-how, I'd still get a completely new upper.

rero360
09-08-2010, 2:21 PM
Dieselpower pretty much nailed it on the head, although I would add one more question to his:

If you don't have those tools, do you know anyone who does that you could borrow?

If you head over to brownells website, they have a series of videos that show how to completely assemble an AR, it really is easier than it seems. I'm actually in the process of picking parts to build an additional upper for myself. I watched the videos to see just how labor intensive it would be and what tools truely are needed, I was suprised just how easy it is.

NiteQwill
09-08-2010, 2:24 PM
Change the upper, cheaper and easier.

Army
09-08-2010, 2:26 PM
As many Ar's that I build...uh assemble for others...I buy complete ones for myself.

Jarhead
09-08-2010, 2:41 PM
well I had thought that an Upper $85.00, Gas Block $50.00 and Labor $50-75.00 and using all other parts off the existing A2 Upper vs $500.00 - $600.00 for a new Upper Complete ......... and I wanted to modify two AR's.

Jarhead
09-08-2010, 2:43 PM
thanks for the advise, will have to take a second look at buying complete Upper

tacticalcity
09-08-2010, 2:48 PM
The cost of the proper tools far exceeds $100 and probably exceeds $200. The cost to have a professional do it for you will come close to $100 but will be less than $200. Figure $50+ an hour. Going to take more than just one hour to do two. If you are in NorCal both Sacramento Black Rifle and TDS Guns will do it for you.

Another thing to consider is that you may find you miss owning an AR with a built in carry handle rear sight. For one thing, you're not as tempted to spend $500+ on optics. For another, if you keep it kiss it will be extremely light weight and once you trick out one of your ARs you may find there are a lot of times you miss having one that weights a lot less.

Like you, all my current ARs are flat tops. I've found I wish I still had the A1 CAR-15 I recently sold. There are times when it would come in handy and be a better option for that day's shooting than the tricked out rifles I am currently running.

If you don't live near a shop that can do the work for I recommend not doing it. Instead sell one of the uppers (if one of them has a barrel longer than 16" sell that one) and keep one of them as a KISS rifle. Then spend the money you made on the upper plus the money you saved on parts and tools on the upper of your dreams. This way you trick out one rifle and let it get as heavy as it ends up getting and keep one very plain so you have a light weight option as well.

Just my $0.02. In the end, they are your rifles. So you do what you want to do.

drs2714
09-08-2010, 2:50 PM
Location?Maybe a fellow Calgunner could do you the favor as far as the tools are concern.

dieselpower
09-08-2010, 2:52 PM
thanks for the advise, will have to take a second look at buying complete Upper

Sell your upper first.
Add that same cash that you were going to spend on parts to the amount you make on the sale, then buy a new upper.

here's the deal
what you were going to spend
85+50+75 = $210

A new BCM upper = $475+$25 shipping

So 500-210 = $290 (what you need sell your upper for)

sell your old upper for $290+ shipping. then add your $210 and you have a new BCM upper.

NiteQwill
09-08-2010, 3:47 PM
Sell your upper first.
Add that same cash that you were going to spend on parts to the amount you make on the sale, then buy a new upper.

here's the deal
what you were going to spend
85+50+75 = $210

A new BCM upper = $475+$25 shipping

So 500-210 = $290 (what you need sell your upper for)

sell your old upper for $290+ shipping. then add your $210 and you have a new BCM upper.
+1

dieselpower hit it right on the head.

Actually, BCM has 14.5 midlength uppers going for only $375 (you must perm attach the hider or they can do it for you). Can't beat that.

Bogart
09-08-2010, 4:00 PM
I say do the work yourself. It's a great way to familiarize yourself with your weapon. Here are some helpful videos, but there are tons of resources online if you search for them. If nothing else watch the videos and decide if you want to do the work. Keep in mind working slowly and with the right tools can keep you from damaging parts (likely just cosmetic damage). Also, you won't need all the tools listed in the videos. I think roll pin punches, a vise, some sort of vise block for the receiver either clamshell or insert (dpms action block), a small hammer, and an ar-15 multi-tool is probably the minimum required.

http://www.brownells.com/.aspx/lid=11004/guntechdetail/How_to_Build_An_AR-15_Video

Jarhead
09-08-2010, 5:41 PM
What about the thought of using existing parts off 20 year old weapons on new Upper ( Flat Top )? Is there an " upgrade " in quality of new barrels, bolts, uppers vs what was available 20 Years ago?

drs2714
09-08-2010, 6:08 PM
Thinking too HARD!
Unless you see a something broken everything will be the same.
Changing the upper doesn't put any more strain on you gun.
As long as your using the similiar ammo.You should be OK!

VaderSpade
09-08-2010, 6:33 PM
If your near Redding I'll help you with it. I have all the tools.

drs2714
09-08-2010, 7:05 PM
Same here!
If your near Riverside I'll help you too!
That is why I asked for Location.

Jarhead
09-08-2010, 7:13 PM
thinking too hard :) .................. I live in Fontana and hang out at WEGC

drs2714
09-08-2010, 7:31 PM
Progress!
PM me when your ready.I'm 15 mins away off 60FWY & 15FWY interchange.
I do have all the tools.

Army
09-08-2010, 8:19 PM
What about the thought of using existing parts off 20 year old weapons on new Upper ( Flat Top )? Is there an " upgrade " in quality of new barrels, bolts, uppers vs what was available 20 Years ago?
Other than some modifications to the exterior, the operating parts are essentially unchanged from 20-30 years ago.