First build help..matching upper & lower
Firearm & Gun Forum - FireArmsTalk.com > Long Guns > Auto & Semi-Auto Discussion > AR-15 Discussion > First build help..matching upper & lower

Reply
 
LinkBack Thread Tools Display Modes
Old 07-05-2013, 11:40 PM   #1
Feedback Score: 0 reviews
 
DickTheNickhead's Avatar
 
Join Date: Apr 2013
Posts: 74
Liked 7 Times on 6 Posts

Default First build help..matching upper & lower

I'm building my first AR...first of all, thanks to EVERYONE for all their input.
My question is, is there anything I while consider or any minor tweaking I may need to do if I'm going with a lower and an upper from different manufacturers? It's a BCM upper and a spikes lower. They're both 5.56.
I didn't think I'd have to worry about it, but I read something in another thread about maybe running into minor tweaks I'd have to do?
An I mislead or what?
Thanks again..

__________________
DickTheNickhead is offline  
 
Reply With Quote

Join FirearmsTalk.com Today - It's Free!

Are you a firearms enthusiast? Then we hope you will join the community. You will gain access to post, create threads, private message, upload images, join groups and more.

Firearms Talk is owned and operated by fellow firearms enthusiasts. We strive to offer a non-commercial community to learn and share information.

Join FirearmsTalk.com Today! - Click Here


Old 07-05-2013, 11:52 PM   #2
Feedback Score: 0 reviews
 
sputnik1988's Avatar
 
Join Date: Jun 2010
Location: The Bluegrass state
Posts: 2,877
Liked 712 Times on 463 Posts
Likes Given: 1949

Default

About the only thing that you should run into is a slight difference in color between the upper and lower, it might bug you at first, but you don't even care after a while

There may also be a slight bit of wobble between the upper and lower, which again isn't that big of a deal, you can remedy that with a $3 accu-wedge. Don't worry about it, it isn't complicated, I doubt you'll have any issues.

__________________
Life is hard; it's harder if you're stupid. - John Wayne

ΜΟΛΩΝ ΛΑΒΕ
sputnik1988 is offline  
 
Reply With Quote
Old 07-05-2013, 11:53 PM   #3
Feedback Score: 0 reviews
 
TheSadPanda's Avatar
 
Join Date: Apr 2010
Location: St. Louis,Missouri
Posts: 1,312
Liked 396 Times on 262 Posts
Likes Given: 71

Default

You SHOULD be fine. These parts are made within a standard set of tolerances. But there is no way for us to know until you physically have the 2 pieces and put them together. Plus you have 2 very reputable brands going into it. That always helps

__________________

"You know what happens to men who go looking for blood? They find it." - Kind Old Man

TheSadPanda is offline  
 
Reply With Quote
Old 07-06-2013, 12:52 AM   #4
Feedback Score: 0 reviews
 
monteros's Avatar
 
Join Date: Nov 2012
Posts: 186
Liked 16 Times on 13 Posts
Likes Given: 69

Default

I am about to order/buy my upper, and the thought crossed my mind too. I was considering buying another manufactures upper... Rock River is really slow right now, so many orders... I guess, I could get something else, and eventually match an upper later, and then user the one I order for another build... I like that...

__________________

monteros
~Build Planning Document
~Build Thread
~Build Photo Album

monteros is offline  
 
Reply With Quote
Old 07-06-2013, 01:03 AM   #5
Feedback Score: 0 reviews
 
Quentin's Avatar
 
Join Date: Apr 2010
Location: Idaho
Posts: 6,642
Liked 1067 Times on 750 Posts
Likes Given: 1063

Default

This was just covered in an active thread. One of the best ways to learn is to read the treasure trove of info in this forum.

http://www.firearmstalk.com/forums/f20/upper-93046/

__________________

______
The biggest issue with assembling an AR isn't so much getting the parts together right - it's getting the right parts together. You'll remember the quality of a gun long after you forget how much you paid for it.
________________________________________
US Army 1966-69, VFW Life Member, Retired Geek

Quentin is offline  
 
Reply With Quote
Old 07-08-2013, 11:51 PM   #6
762
Feedback Score: 0 reviews
 
762's Avatar
 
Join Date: Oct 2011
Location: NC
Posts: 328
Liked 41 Times on 30 Posts
Likes Given: 39

Default

i ordered a del-ton lower and a PSA upper, i have an angle grinder, files, a dremel, sand paper, wire wheels, steel wool and a bench top grinder if i have any fitment issues LOL. i'm planning to duracoat them both so they match. i got an accu wedge just in case too

__________________

Remington 700P (suppressed) - .308
Norinco SKS - 7.62x39
Mossberg 500 - 12 ga.
Savage FV64 - .22
Marlin Model 60 - .22
EAA Witness P - 9mm
AR15 - 5.56/.223
AR15 - 5.56/.223
AR15 - .223 Wylde 10.5" Pistol

762 is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
Build an upper from 'scratch' ? (AR-15 upper by parts) KG7IL AR-15 Discussion 9 04-29-2013 09:38 PM
same lower for gas piston or di upper? Armed-Citizen AR-15 Discussion 5 10-14-2012 01:13 PM
PSA upper with ST lower? JuniorRanger AR-15 Discussion 6 06-03-2012 12:35 AM
AR Upper Build Question - DD Barrel Nut Hard To Thread On To Upper Cnynrat AR-15 Discussion 3 05-27-2009 04:52 AM
upper and lower recievers lasherb1 AR-15 Discussion 13 03-03-2008 09:01 PM