Calguns.net  

Home My iTrader Join the NRA Donate to CGSSA Sponsors CGN Google Search
CA Semiauto Ban(AW)ID Flowchart CA Handgun Ban ID Flowchart CA Shotgun Ban ID Flowchart
Go Back   Calguns.net > FIREARMS DISCUSSIONS > Centerfire Rifles - Semiautomatic or Gas Operated
Register FAQ Members List Calendar Mark Forums Read

Centerfire Rifles - Semiautomatic or Gas Operated Centerfire rifles, carbines and other gas operated rifles.

Reply
 
Thread Tools Display Modes
  #1  
Old 12-29-2012, 9:41 AM
goldduster goldduster is offline
CGN/CGSSA Contributor
CGN Contributor
 
Join Date: Jun 2009
Location: Silicon Valley
Posts: 142
iTrader: 3 / 100%
Default Polymer vs Metal AR Lower

Not that familiar with the AR and have noticed both Polymer and Metal Lowers. Could you please explain the pros and cons of each. Thanks.
Reply With Quote
  #2  
Old 12-29-2012, 9:45 AM
ramathorn's Avatar
ramathorn ramathorn is offline
Senior Member
 
Join Date: Oct 2010
Location: Sacramento, Ca
Posts: 1,548
iTrader: 21 / 100%
Default

Metal = stronger
Polymer = lighter
Reply With Quote
  #3  
Old 12-29-2012, 10:22 AM
!@#$ !@#$ is offline
Senior Member
 
Join Date: Nov 2006
Posts: 2,309
iTrader: 230 / 100%
Default

the polymer lowers are for toys and the aluminum lowers are for rifles that can take abuse.


if you only get one you would be a fool to get the polymer.
Reply With Quote
  #4  
Old 12-29-2012, 10:25 AM
maddoggie13's Avatar
maddoggie13 maddoggie13 is offline
Senior Member
 
Join Date: Sep 2009
Location: Los Altos Hills
Posts: 2,091
iTrader: 4 / 100%
Default

Would you call glock a toy?
Reply With Quote
  #5  
Old 12-29-2012, 10:37 AM
!@#$ !@#$ is offline
Senior Member
 
Join Date: Nov 2006
Posts: 2,309
iTrader: 230 / 100%
Default

Quote:
Originally Posted by maddoggie13 View Post
Would you call glock a toy?
no glock has a long history of performance.


other than the cavarms lower that is built much more sturdy these new "clone" lowers have a history of breaking.

they need to be beefed up if they have any chance at being anywhere as durable as a standard lower.



i've seen more broken poly lowers in the last 3 years than i've seen with aluminum lowers in 25 years and there is a hell of a lot more aluminum lowers out there.


but people would rather "save" $30 and buy a crap part.
Reply With Quote
  #6  
Old 12-29-2012, 10:38 AM
tkxiong's Avatar
tkxiong tkxiong is offline
Member
CGN Contributor
 
Join Date: Oct 2012
Posts: 207
iTrader: 14 / 100%
Default

All gun are toy. If your just going to collect them, lock it up, or just talk about how nice your gun is compare to other than get a polymer. But if your like me, you take it out shoot, drop and scratch it, beat it up than you will want to get aluminum. Just my 2 cent
Reply With Quote
  #7  
Old 12-29-2012, 11:12 AM
Arkangel's Avatar
Arkangel Arkangel is offline
Veteran Member
 
Join Date: May 2010
Location: San Diego, CA
Posts: 4,415
iTrader: 3 / 100%
Default

I got my NFA lower for $86, it comes with a lifetime warranty so I figured I couldn't loose much if it went south on me.

There are some videos where the NFA guys torture tested one of their lowers and it did fine. Once mine is put together I will put it through its paces and see what happens.
__________________
_██_
(ಠ_ృ) riveting tale, chap.
Reply With Quote
  #8  
Old 12-29-2012, 1:05 PM
Dinosaur Jr's Avatar
Dinosaur Jr Dinosaur Jr is offline
Senior Member
 
Join Date: May 2012
Location: Lost Angeles
Posts: 1,707
iTrader: 6 / 100%
Default

Friends don't let friends buy poly lowers...
__________________
Laws against murder and attempted murder should have been the only gun control laws ever needed in America...
Reply With Quote
  #9  
Old 12-29-2012, 1:22 PM
badlandsbutch badlandsbutch is offline
Junior Member
 
Join Date: May 2010
Posts: 94
iTrader: 5 / 100%
Default

seen a polymer break where buffer tube screws in, not good.
Reply With Quote
  #10  
Old 12-29-2012, 1:32 PM
artoaster's Avatar
artoaster artoaster is offline
Senior Member
 
Join Date: Mar 2012
Location: Ventura Co.
Posts: 1,158
iTrader: 8 / 100%
Default

Can't use metal fire control group. Plastic trigger, hammer. Bummer.
__________________


You generally run out of time before you run out of ammo.

NRA Member [/FONT***] 
[

NRA Member
CGF Member
AKA Richard Cramden
Reply With Quote
  #11  
Old 12-29-2012, 1:41 PM
bill_k_lopez bill_k_lopez is offline
Banned
 
Join Date: May 2011
Location: Long Beach
Posts: 2,840
iTrader: 20 / 95%
Default

Quote:
Originally Posted by artoaster View Post
Can't use metal fire control group. Plastic trigger, hammer. Bummer.
Not true.
Reply With Quote
  #12  
Old 12-29-2012, 1:42 PM
roushstage2's Avatar
roushstage2 roushstage2 is offline
Veteran Member
 
Join Date: Aug 2011
Location: Amador County
Posts: 2,842
iTrader: 13 / 100%
Default

Quote:
Originally Posted by artoaster View Post
Can't use metal fire control group. Plastic trigger, hammer. Bummer.
What polymer lowers? They come with a plastic FCG, but they can be swapped out for standard ones.
__________________
Reply With Quote
  #13  
Old 12-29-2012, 1:47 PM
M1NM's Avatar
M1NM M1NM is offline
Veteran Member
 
Join Date: Oct 2011
Location: West Covina
Posts: 4,537
iTrader: 41 / 100%
Default

Quote:
Originally Posted by maddoggie13 View Post
Would you call glock a toy?
apples and oranges - pistol vs rifle - don't forget the Glock has metal molded into the poly to increase the durability.
__________________
Just upgraded to help beat Hillary.
Reply With Quote
  #14  
Old 12-29-2012, 1:50 PM
H2H H2H is offline
Senior Member
 
Join Date: Jun 2005
Location: Miami, FL
Posts: 1,681
iTrader: 50 / 100%
Default

beggars can't be choosers I'll take polymer lower over no aluminium available.

they are light and a bit cheaper. NFA lowers come with lifetime warranty for example. CAn be good to build a liwt or cheaper rifle for a kid or wife..etc..
Reply With Quote
  #15  
Old 12-29-2012, 1:58 PM
NSR500 NSR500 is offline
Banned
 
Join Date: Aug 2006
Location: Houston & SF Bay Area
Posts: 19,543
iTrader: 2 / 100%
Default

Metal
Reply With Quote
  #16  
Old 12-29-2012, 2:20 PM
shamu415's Avatar
shamu415 shamu415 is offline
Senior Member
 
Join Date: Jan 2008
Location: SF, Bay Area
Posts: 687
iTrader: 129 / 100%
Default

Metal all day. There's a reason poly lowers have a lifetime guarantee. It's okay for a range gun, but anything other then that, I wouldn't trust my life with it.
Reply With Quote
  #17  
Old 12-29-2012, 2:51 PM
bill_k_lopez bill_k_lopez is offline
Banned
 
Join Date: May 2011
Location: Long Beach
Posts: 2,840
iTrader: 20 / 95%
Default

Quote:
Originally Posted by shamu415 View Post
Metal all day. There's a reason poly lowers have a lifetime guarantee. It's okay for a range gun, but anything other then that, I wouldn't trust my life with it.
Oh you mean like 90% of people that don't require "trusting their life" with a rifle in the field...

Same argument EVERYONE wanted to put up over the M&P 15 sport. "It doesn't have a dust cover, I wouldn't want to have a rifle like that in the desert" yeah - cause so many arm chair special forces guys here on cal guns living at home with their parents could get called up at any minute from playing COD to go to fight in Afghanistan with their own rifles...

Before the tragic accident where all my rifles fell off my boat, I had 3 aluminium and 3 poly lowers - put them through the harsh environment out in ASR (those concrete rifle benches are MURDER I tell you), and guess what - nothing has ever broken, nothing has ever cracked...on any of them.

By the way - handguns through some manufacturers carry a lifetime guarantee, as well as any gun you buy through Davidsons - so are you telling me its because they're all cr*p too??

Last edited by bill_k_lopez; 12-29-2012 at 2:57 PM..
Reply With Quote
  #18  
Old 12-29-2012, 2:59 PM
DucatiSS's Avatar
DucatiSS DucatiSS is offline
Junior Member
 
Join Date: Nov 2012
Posts: 81
iTrader: 0 / 0%
Default

Quote:
Originally Posted by ramathorn View Post
Metal = stronger
Polymer = lighter
I agree. The funny thing is that some of my friends that were in Southeast Asia many years ago hated the "new" toy rifle that looked like it was made by Mattel. (I think some parts were)

Today we have grown to love, cherish and modify that same toy rifle.


Oh yea, I will stick with metal. I am just old fashioned.

Last edited by DucatiSS; 12-29-2012 at 3:01 PM..
Reply With Quote
  #19  
Old 12-29-2012, 3:26 PM
el tardo el tardo is offline
Senior Member
 
Join Date: Sep 2012
Location: Earth
Posts: 658
iTrader: 55 / 100%
Default

got to love the internet-nothing based on facts just opinions!
polymer is just fine and its not very weak either and yes you can break anything. if your taking about New Frontier Armory polymer lowers ,there are great.the other company's that make polymer lowers i cant speak for.

and because i want to start crap-look into any area that needs alot of strength and you will find that part is made from steel. aluminum is used to lower the weight
Reply With Quote
  #20  
Old 12-29-2012, 6:38 PM
Pistolgrip Pump Pistolgrip Pump is offline
Banned
 
Join Date: Jun 2012
Posts: 1,162
iTrader: 21 / 96%
Default

There's nothing wrong with a polymer lower..some have lifetime warranties and the one I was looking at felt pretty good. That being said, buy a metal one. I did. Just think of that extra money going towards peace-of-mind.
Reply With Quote
  #21  
Old 12-29-2012, 6:43 PM
chead's Avatar
chead chead is offline
Veteran Member
 
Join Date: Apr 2011
Location: San Diego
Posts: 3,070
iTrader: 19 / 100%
Default

Not all polymers are the same.
__________________
Quote:
Originally Posted by NorCalK9.com View Post
Hecka funny all my friends with AR's call them "clips" but I call them bullet holder things lol
Quote:
Originally Posted by MikeR View Post
So suck it HK, If I wanted an $800 pistol with a crap trigger I would just go buy 2 Glocks.
Reply With Quote
  #22  
Old 12-29-2012, 8:35 PM
roushstage2's Avatar
roushstage2 roushstage2 is offline
Veteran Member
 
Join Date: Aug 2011
Location: Amador County
Posts: 2,842
iTrader: 13 / 100%
Default

Quote:
Originally Posted by shamu415 View Post
Metal all day. There's a reason poly lowers have a lifetime guarantee. It's okay for a range gun, but anything other then that, I wouldn't trust my life with it.
Yeah, because nothing on a metal lower ever breaks
__________________
Reply With Quote
  #23  
Old 12-29-2012, 8:44 PM
thechozenone thechozenone is offline
Member
 
Join Date: Dec 2012
Posts: 245
iTrader: 4 / 100%
Default

Quote:
Originally Posted by H2H View Post
beggars can't be choosers I'll take polymer lower over no aluminium available.
so true...so true...

I only bought a poly lower because I could not find aluminum anywhere....literately....now shopping for metal ones....
Reply With Quote
  #24  
Old 12-29-2012, 8:56 PM
H2H H2H is offline
Senior Member
 
Join Date: Jun 2005
Location: Miami, FL
Posts: 1,681
iTrader: 50 / 100%
Default

stripped lowers in stock at NFA..$79 ea...say whaaat ??

I think I will save my metal ones and use the polymer for plinking. Cheap insurance IMO
Reply With Quote
  #25  
Old 12-29-2012, 8:58 PM
freonr22's Avatar
freonr22 freonr22 is offline
I need a LIFE!!
 
Join Date: Dec 2008
Location: San Jose
Posts: 11,834
iTrader: 28 / 100%
Default

Can you plastic weld a polymer? Idk? Like if you break a guard ear off?
__________________
<img src=http://calgunsfoundation.org/images/stories/San-Benito.jpg border=0 alt= />[IMG]file:///C:/Users/PCMECH%7E1/AppData/Local/Temp/moz-screenshot-3.png[/IMG][IMG]file:///C:/Users/PCMECH%7E1/AppData/Local/Temp/moz-screenshot-4.png[/IMG]
Quote:
Originally Posted by dantodd View Post
We will win. We are right. We will never stop fighting.
Quote:
Originally Posted by bwiese View Post
They don't believe it's possible, but then Alison didn't believe there'd be 350K - 400K OLLs in CA either.
Quote:
Originally Posted by louisianagirl View Post
Our fate is ours alone to decide as long as we remain armed heavily enough to dictate it.
Reply With Quote
  #26  
Old 12-29-2012, 8:58 PM
freonr22's Avatar
freonr22 freonr22 is offline
I need a LIFE!!
 
Join Date: Dec 2008
Location: San Jose
Posts: 11,834
iTrader: 28 / 100%
Default

Can you plastic weld a polymer? Idk? Like if you break a guard ear off?
__________________
<img src=http://calgunsfoundation.org/images/stories/San-Benito.jpg border=0 alt= />[IMG]file:///C:/Users/PCMECH%7E1/AppData/Local/Temp/moz-screenshot-3.png[/IMG][IMG]file:///C:/Users/PCMECH%7E1/AppData/Local/Temp/moz-screenshot-4.png[/IMG]
Quote:
Originally Posted by dantodd View Post
We will win. We are right. We will never stop fighting.
Quote:
Originally Posted by bwiese View Post
They don't believe it's possible, but then Alison didn't believe there'd be 350K - 400K OLLs in CA either.
Quote:
Originally Posted by louisianagirl View Post
Our fate is ours alone to decide as long as we remain armed heavily enough to dictate it.
Reply With Quote
  #27  
Old 12-29-2012, 8:59 PM
freonr22's Avatar
freonr22 freonr22 is offline
I need a LIFE!!
 
Join Date: Dec 2008
Location: San Jose
Posts: 11,834
iTrader: 28 / 100%
Default

Can you plastic weld a polymer? Idk? Like if you break a guard ear off?
__________________
<img src=http://calgunsfoundation.org/images/stories/San-Benito.jpg border=0 alt= />[IMG]file:///C:/Users/PCMECH%7E1/AppData/Local/Temp/moz-screenshot-3.png[/IMG][IMG]file:///C:/Users/PCMECH%7E1/AppData/Local/Temp/moz-screenshot-4.png[/IMG]
Quote:
Originally Posted by dantodd View Post
We will win. We are right. We will never stop fighting.
Quote:
Originally Posted by bwiese View Post
They don't believe it's possible, but then Alison didn't believe there'd be 350K - 400K OLLs in CA either.
Quote:
Originally Posted by louisianagirl View Post
Our fate is ours alone to decide as long as we remain armed heavily enough to dictate it.
Reply With Quote
  #28  
Old 12-29-2012, 9:03 PM
H2H H2H is offline
Senior Member
 
Join Date: Jun 2005
Location: Miami, FL
Posts: 1,681
iTrader: 50 / 100%
Default

the NFA comes with its own trigger guard molded in the lower.
Reply With Quote
  #29  
Old 12-29-2012, 11:47 PM
Flying Sig's Avatar
Flying Sig Flying Sig is offline
CGN/CGSSA Contributor
CGN Contributor
 
Join Date: Sep 2009
Location: Ventura County
Posts: 903
iTrader: 41 / 100%
Default

Reply With Quote
  #30  
Old 12-30-2012, 12:13 AM
Bug Splat's Avatar
Bug Splat Bug Splat is offline
Calguns Addict
CGN Contributor
 
Join Date: Dec 2007
Posts: 6,562
iTrader: 11 / 100%
Default

Poly lowers coupled with a Ceramic uppers can get through airline metal detectors and body scanners if gently inserted in the anus and for every 30 rounds fired a puppy is killed by a stray bullet. Read it on a California Gov website

Last edited by Bug Splat; 12-30-2012 at 12:16 AM..
Reply With Quote
  #31  
Old 12-30-2012, 12:31 AM
darksands's Avatar
darksands darksands is offline
Senior Member
 
Join Date: May 2008
Location: So. Cal
Posts: 648
iTrader: 17 / 100%
Default

I have 4 AR's that are forged and I just picked up 2 Poly lowers for S&G from Enterprise Arms who claim "are rated better than the New Frontier lowers guaranteed & come with a LIFETIME Warranty."

If this is your first AR I would go with metal as there isn't much history on the poly lowers but that isn't to say that polymer is weaker than aluminum.
__________________
All that is necessary for the triumph of evil is that good men do nothing

"We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm." ---George Orwell on a BBC broadcast, April 4, 1942

"Fast is fine. Accuracy is final. You need to learn to shoot slow, real fast." ---Wyatt Earp

Last edited by darksands; 12-30-2012 at 12:43 AM..
Reply With Quote
  #32  
Old 12-30-2012, 12:33 AM
dshooter dshooter is offline
Member
 
Join Date: Sep 2010
Posts: 281
iTrader: 100 / 100%
Default

The real action is always in the upper. Don't touch the barrel after shooting. The lower are trigger parts that take little abuse. 30 years of polymer pistols already. More guns these days are polymer. Can't see why you'd think metal is superior. Besides, both lowers (plum and lw) have lifetime warranties.

Watch youtube videos. Youtube can answer most questions.
Reply With Quote
  #33  
Old 12-30-2012, 1:50 AM
giantsfan650 giantsfan650 is offline
Member
 
Join Date: May 2010
Posts: 154
iTrader: 0 / 0%
Default

For your first rifle, metal.

No brainer.
Reply With Quote
  #34  
Old 12-30-2012, 2:55 AM
miwxq miwxq is offline
Member
 
Join Date: Feb 2010
Posts: 206
iTrader: 7 / 100%
Default

Metal just on the safe side...
Reply With Quote
  #35  
Old 12-30-2012, 4:34 AM
Mail Clerk Mail Clerk is offline
Senior Member
 
Join Date: Aug 2008
Posts: 2,089
iTrader: 0 / 0%
Default

Quote:
Originally Posted by H2H View Post
beggars can't be choosers I'll take polymer lower over no aluminium available.

they are light and a bit cheaper. NFA lowers come with lifetime warranty for example. CAn be good to build a liwt or cheaper rifle for a kid or wife..etc..
I have an NFA lower and it fits well. I haven't hada chance to shoot it yet but considering it has such a good warranty then who cares if it breaks! I don't shoot and abuse my rifles lke some people here on the forum but then again I don't work for some security company or anything like that. I just shoot to relax and have a little fun. If I were going to war then I'd choose a metal lower.

Mail Clerk
Reply With Quote
  #36  
Old 12-30-2012, 4:52 AM
datsunrdster67's Avatar
datsunrdster67 datsunrdster67 is offline
Member
 
Join Date: May 2012
Location: Wtt/ Front Sight Diamond for a 1911 9mm or .45 please!!!
Posts: 182
iTrader: 0 / 0%
Default

I agree with you all... well sorta ill take Polymer Lower daym... ill take any lower by the way all the guns stores are looking.. Anybody have a Poly lower? San Diego i want to get a few.
Reply With Quote
  #37  
Old 12-30-2012, 6:32 AM
Quiet's Avatar
Quiet Quiet is offline
short bus driver
 
Join Date: Mar 2007
Location: the 909
Posts: 18,922
iTrader: 10 / 100%
Default

metal = stronger more durable
polymer = lighter less durable



Look towards the Malaysians to see how durable/long lasting polymer receivers can be.
Early-2000s, the Malaysian Air Force Special Forces (PASKAU) adopted a select-fire variant of the Bushmaster Carbon-15.
__________________


"If someone has a gun and is trying to kill you, it would be reasonable to shoot back with your own gun. - Dalai Lama (Seattle Times, 05-15-2001).
Reply With Quote
  #38  
Old 12-30-2012, 6:34 AM
caw446's Avatar
caw446 caw446 is offline
Senior Member
 
Join Date: Dec 2010
Location: Inland Empire
Posts: 762
iTrader: 49 / 100%
Default Gotta love it!

Polymer works just fine... 1K flawless rounds run off this weekend through my LWRC M6-SL upper/NFA LW-15 lower without a hickup. Beat the ***** out of the gun too (not intentionally, but it got dropped and thrown around in the back of my truck just like my PWS MK214 and my Colt 6920). Should the SHTF, I serious doubt anybody on this forum or any other forum caught without an AR or any rifle for that matter would be *****in if they were handed the gun... In the end everybody has their own opinion and others will continue to be stuck in the past and base their responses on pure theory or ride someone else's shoulders to make themselves feel better. ; )

Last edited by caw446; 12-30-2012 at 12:21 PM..
Reply With Quote
  #39  
Old 12-30-2012, 6:50 AM
chrisf chrisf is offline
Banned
 
Join Date: Aug 2011
Location: Hayward unfortunately
Posts: 6,503
iTrader: 11 / 100%
Default

I have both, thousands of rounds through my polymer, buried in sand and all and has functioned flawlessly. It is a plumcrazy, I would recommend you install a metal LPK in it as I have done. I also have a metal ar. It really comes down to looks IMO. I like the metal ones, either one is ok but if I only had one it would be metal.
Reply With Quote
  #40  
Old 12-30-2012, 6:54 AM
daybreak's Avatar
daybreak daybreak is offline
Senior Member
 
Join Date: Dec 2010
Posts: 1,735
iTrader: 6 / 100%
Default

but what's the point? Why would you choose polymer over a metal receiver? Is it just an availability thing? Is the weight savings that important?

I don't hate polymer, I've owned polymer pistols. But those have a longer track record. I don't see a worthwhile benefit for going polymer, other than availability if that's an issue. They're NOT that much cheaper compared to a metal receiver, so why bother?
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT -8. The time now is 1:59 PM.




Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Proudly hosted by GeoVario the Premier 2A host.
Calguns.net, the 'Calguns' name and all associated variants and logos are ® Trademark and © Copyright 2002-2016, Calguns.net an Incorporated Company All Rights Reserved.