Jump to content
308AR.com Community
  • Visit Aero Precision
  • Visit Brownells
  • Visit EuroOptic
  • Visit Site
  • Visit Beachin Tactical
  • Visit Rainier Arms
  • Visit Ballistic Advantage
  • Visit Palmetto State Armory
  • Visit Cabelas
  • Visit Sportsmans Guide

Fit of a KAK LR308 upper to an Aero M5 Lower - good, bad, froggy? :)


Tack14
 Share

Recommended Posts

Have a chance to pick up an Aero M5 308 lower at  a good price and was thinking about maybe putting one together with a KAK LR308 upper for a build.

I am curious if anybody has ever put these particular two halves together and how well they fit.  I have KAK LPK's and LR308 "conversion"  parts (takedown and pivot pins, bolt catch, and extended mag release (extra threads length).

I'm thinking in particular of fit of the takedown and pivot pins, whether I should expect to need a dremel tool to "make it fit" (LOL), etc.

Thanks

Tack14

Link to comment
Share on other sites

Just ignore all the folks here who recommend using matched uppers and lowers, and go for it. So what if some of those people are advising that because they learned it the hard way? Odds are you'll be the exception. It'll be fine, just do it already.... 

:evil:

 

You're already ahead of the game by getting a great deal with your lower. Why waste that sensible good deal by following it with wasted time and bad decisions? 

Get a matching M5 upper and enjoy building a rifle without having to cobble mismatched parts together.

Or don't, either way let us know how it works out. If it's REALLY bad, we'd like pictures.

 

Link to comment
Share on other sites

lol.

Well, i can tell you the the same kind and ~amount of gap between upper/lower at the back is there as I've seen before.  Also, the KAK 308 front pivot pin is a bit short of fully reaching the driver's side.  It's probably not enough to be a problem, somewhere under 1/8".  But the KAK 308 front and rear pins seem to be a good diameter match.

They sat nicely together.  The tension set screw on the lower was backed out already and (with no BCG mind you) nothing held them apart (ie, no "dremelsmithing" looked to be needed).

It would ~probably~ work OK but since I can get an Aero upper to match I will do that instead.

Link to comment
Share on other sites

34 minutes ago, Tack14 said:

lol.

Well, i can tell you the the same kind and ~amount of gap between upper/lower at the back is there as I've seen before.  Also, the KAK 308 front pivot pin is a bit short of fully reaching the driver's side.  It's probably not enough to be a problem, somewhere under 1/8".  But the KAK 308 front and rear pins seem to be a good diameter match.

They sat nicely together.  The tension set screw on the lower was backed out already and (with no BCG mind you) nothing held them apart (ie, no "dremelsmithing" looked to be needed).

It would ~probably~ work OK but since I can get an Aero upper to match I will do that instead.

Whoa!  Wait!  You already have the KAK upper?  Let's run this setup and see what happens, man - for real.  There's something to be learned here - be it good or bad, let's do this...   :thumbup::hail:

This is the kind of stuff that make this place better.  If we don't have "real info" on something that some is asking - we'll find it out, and report back later...  

Link to comment
Share on other sites

  • 2 weeks later...

I still have a couple KAK 308 uppers but my focus has shifted.  At some point I will, for the benefit of the forum users, try this out and report on it.

But for now I am going to focus on matched upper/lower endeavors.

Now I need to arrive at a good combo of DPMS Gen 1 rifle-length buffer system parts.  a specific brand/model of buffer tube to match up with a Heavy Buffers AR10 XH buffer.  Studying past threads info.

Link to comment
Share on other sites

Rifle receiver extensions are all the same, AR15 (A1 and A2), .308AR, whatever.  If made right, they're all 9 11/16" internal depth.  Combine that Slash buffer with an Armalite EA1095 spring, and you'll be set.  :thumbup:

Edited by 98Z5V
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...