Warning

 

Close
Confirm Action

Are you sure you wish to do this?

Cancel Confirm
AR15.COM
AR Sponsor
1/12/2011 5:50:18 PM EDT
Hello All!

First post, so please go easy on me.  I did a search and can't find an answer to my question, i found a few close questions/answers, but none that encompass the entire question...  So,  I got a Spikes stripped lower for Christmas.  I recently placed an order from Smartgunner for a Daniel Defense upper deal 16" LW, carbine length gas system, flat top, DD BCG, Charging handle and vortex hider.  

I have been reading this forum non stop looking for ideas and learning so much.  I stumbled upon this article about M4 reliability:
http://www.defensereview.com/the-big-m4-myth-fouling-caused-by-the-direct-impingement-gas-system-makes-the-m4-unreliable/

Here is my question.  The article(in the conclusion section) suggests to replace the buffer spring with a better one, use a h2 buffer, crane o-ring, and upgraded ejector spring.  Do you recommend doing ALL 4 things?  Or can i get away with doing just a heavy buffer?  I am about to purchase from Spikes the Magpul CTR mil-spec kit with their T2 buffer, but I'm trying to figure out if you recommend doing the other upgrades or not(or am I wasting my money on the heavy buffer to begin with).  I'm looking for the most reliable weapon i can assemble.  Any advice: good, bad or ugly would be greatly appreciated!

Thanks
1/12/2011 6:20:05 PM EDT
[#1]
Quoted:
Hello All!

First post, so please go easy on me.  I did a search and can't find an answer to my question, i found a few close questions/answers, but none that encompass the entire question...  So,  I got a Spikes stripped lower for Christmas.  I recently placed an order from Smartgunner for a Daniel Defense upper deal 16" LW, carbine length gas system, flat top, DD BCG, Charging handle and vortex hider.  

I have been reading this forum non stop looking for ideas and learning so much.  I stumbled upon this article about M4 reliability:
http://www.defensereview.com/the-big-m4-myth-fouling-caused-by-the-direct-impingement-gas-system-makes-the-m4-unreliable/

Here is my question.  The article(in the conclusion section) suggests to replace the buffer spring with a better one, use a h2 buffer, crane o-ring, and upgraded ejector spring.  Do you recommend doing ALL 4 things?  Or can i get away with doing just a heavy buffer?  I am about to purchase from Spikes the Magpul CTR mil-spec kit with their T2 buffer, but I'm trying to figure out if you recommend doing the other upgrades or not(or am I wasting my money on the heavy buffer to begin with).  I'm looking for the most reliable weapon i can assemble.  Any advice: good, bad or ugly would be greatly appreciated!

Thanks


Extractor O-rings are usually not necessary on 16" guns.  They can be helpful on SBRs.  However, they come in the BCM Extractor Upgrade Kit, so it's not a bad idea to keep it in your spare parts kit.  I would definitely install the extractor insert and extractor spring from said kit in my bolt.

I've never had issues with regular action springs so long as I don't let them wear out (just like the action spring in a handgun, or a magazine spring).  

Regarding buffers, view the following videos and draw your own conclusion:
Vid 1  Vid 2

And a note on the T2 buffer: Link
1/12/2011 6:22:59 PM EDT
[#2]
will your rifle "work" without the upgrades?  Yes.

will the upgrades make your rifle more "reliable"?  Yes.

I would recommend all of those if reliability is  your goal.  There are a couple of other things you could do to upgrade your reliability but those particular upgrades are the cheapest, and the best place to start.  

I would also suggest starting with the extractor upgrade... BCM sells a kit that will handle it.

Also.. your rifle is going to be specific as far as the best buffer to use... its a equation involving your barrel length, gas port size, and type of ammo used.  It is a case by case basis.
1/12/2011 6:28:32 PM EDT
[#3]
The DD bolt should already have the proper extractor, spring and insert in it.  Don't bother with the O ring, bolts with proper components don't need them.

As long as you buy the stock kit from a reputable manufacturer using reputable components, you should be fine.  I use BCMs receiver extension, spring and buffer.  An H buffer would probably be fine for a LW carbine setup.  All reviews of the ST2, from people whose opinion I trust, are good as well.  Get it put together and shoot it.  If it runs reliably the you don't have a problem.
1/12/2011 6:36:40 PM EDT
[#4]
Quoted:
The DD bolt should already have the proper extractor, spring and insert in it.  Don't bother with the O ring, bolts with proper components don't need them.

As long as you buy the stock kit from a reputable manufacturer using reputable components, you should be fine.  I use BCMs receiver extension, spring and buffer.  An H buffer would probably be fine for a LW carbine setup.  All reviews of the ST2, from people whose opinion I trust, are good as well.  Get it put together and shoot it.  If it runs reliably the you don't have a problem.


This answer.
1/12/2011 7:17:15 PM EDT
[#5]
Thanks for the help guys.  Those video links helped me understand the situation better too.  Much appreciated!
AR Sponsor