Lube For New LAR-8

[Stonebuster]

I will be taking possession of a NOS LAR-8 this weekend.

 

Where do I need to lubricate the rifle before shooting?

 

Thanks in advance.

 

Buster

[mrmackc]

Many of us use Mobil One 10W40 synthetic motor oil. Soak the BCG bolt and the inside of the upper where the BCG runs and  get it almost dripping wet, be sure to not oil the chamber. This works pretty well to break in the rifle, Many of us considered 100 rounds about right for break in, back when ammo was cheaper, maybe 20 or 25 rounds will be a good start. 147 grain 7.62 x 51. If you don't get a manual for the rifle there is a DPMS manual online that can be downloaded, there is a thread some where here about downloading a manual.

Edited May 28, 2021 by mrmackc

[Armed Eye Doc]

Here is a link to the LAR-8 manual.

https://www.rockriverarms.com/images/pdfs/RRA_LAR8opman.pdf

As Mack said, Mobil One is a great lubricant.  In addition to not getting it in the chamber, you will need to wipe oil from the bolt face prior to shooting.

 

[mrmackc]

1 hour ago, Armed Eye Doc said:

Here is a link to the LAR-8 manual.

https://www.rockriverarms.com/images/pdfs/RRA_LAR8opman.pdf

As Mack said, Mobil One is a great lubricant.  In addition to not getting it in the chamber, you will need to wipe oil from the bolt face prior to shooting.

 

Thanks for the help Doc. And That is a great download for anLAR-8 manual from RR Arms.

[mrmackc]

CAUTION!

DO NOT FIRE THE RIFLE IF THE CAM PIN IS MISSING OR DAMAGED!.......THE RIFLE WILL EXPLODE!!!!!

 

Edited May 28, 2021 by mrmackc

[Stonebuster]

Explain the cam pin.

[Stonebuster]

OK-got it from the manual. You got me: HOW OFTEN DO LAR-8'S BLOW UP?

 

 

Buster

[mrmackc]

I was hoping  that CAUTION! would get you to download the manual, curiosity may have killed the cat, but it may have saved a shooter.

By the way the BCG goes together easily without that cam pin. ask me how I know.

 

Any time the rifle is fired with a normal round and the campin is nor in the rifle It will be a mackeral (next thing to a miracle) if it don't explode.

[Stonebuster]

Would you consider that a design flaw?

 

I wonder if RRA emphasizes this warning.

 

Darwin Never Sleeps!

 

Buster

[mrmackc]

No,  Stonebuster  cam pin not a design flaw in most cases problems with the cam pin and it's function is an operator error!

You wonder if RRA emphasizes this warning. 

RRA 's manual has the warning about the cam pin printer in RED  for a reason, don't you think?

Darwin, sometimes catches a nap on the job!

[Stonebuster]

 

Well I'll be picking up my manual with the rifle in about 40 minutes. Thank you for this timely and critical clarification. Will post my rifle up as I get familiar with it.

 

 

Buster 

[Stonebuster]

 

OK got the rifle. Flat Top A4 never fired. I need to oil it up-because on a fallen hammer the charging handle all but locks up. I am sure it will become more easily operated once I oil and cycle. Thanks for the info. Will post up the rifle in a day or two.

 

Buster

[Armed Eye Doc]

LAR8 is a great rifle.  I have not had a bit of problem with mine in 8+ years.

[unforgiven]

2 hours ago, Armed Eye Doc said:

LAR8 is a great rifle.  I have not had a bit of problem with mine in 8+ years.

Damn good rifle. 🍺🍺🇺🇸

[Stonebuster]

OK. I got the Mobil 40 and stripped the BCG just to the bolt. All parts well oiled and ready to break in.

 

I now fully understand the cam pin and its relation to the firing pin and bolt body. I went ahead and ordered an extra cam pin, firing pin, and firing pin retaining pin.

 

I will start another post on this rifle after I get some pics. Thanks for all the great information.

 

Buster

[392heminut]

1 hour ago, Stonebuster said:

 

I now fully understand the cam pin and its relation to the firing pin and bolt body. I went ahead and ordered an extra cam pin,

 

Can't say as I've ever heard of a cam pin failing.

[Stonebuster]

Not big money really-they warn you about explosions and such if it is damaged. I'll just put the parts in the butt of the gun. Do firing pin retaining pins ever fail or dislodge under normal usage?

 

 

Buster

Edited June 3, 2021 by Stonebuster

[Thirstydg323]

I heard of the head bust off of a regular cotter pin that someone substituted.

Didnt blow up but it wasn't pretty having to beat it apart.

 

 

[98Z5V]

6 hours ago, Stonebuster said:

Not big money really-they warn you about explosions and such if it is damaged. I'll just put the parts in the butt of the gun. Do firing pin retaining pins ever fail or dislodge under normal usage?

 

 

Buster

They can distort, when you're shooting hot loads.  Makes them a real PITA to get out, and they'll never go back in after that. 

[mrmackc]

On 6/3/2021 at 12:07 PM, 392heminut said:

Can't say as I've ever heard of a cam pin failing.

Several that I know of have been in Law Enforcement issued Ar 15 and M16, no data on LR308 but it is something to be aware of, Cam pins have been known to crack or distort in some inspected rifles. I under stand many SWAT teams do a lot of practice with the 5.56 issue rifles. I am friends of a former Texas Sheriff 's Dept. Armorer..