Break in for the Robinson Arms XCR Rifle provided by Variablebinary...SF

22034 Views 47 Replies 28 Participants Last post by berger, Jan 20, 2014

tzoid

Discussion Starter · Aug 19, 2007

This is the suggested break in and a few tips provided by a Huge supporter of Robinson and the XCR Rifle

Thanks...VB. ;D

Just remember the 300 round break in before messing with the gas system. I shoot mine on gas setting 2 with NATO M855/SS109

Make sure to tighten the gas nut if you take it off or it can become loose while shooting which is bad if you hike and shoot.

Make sure not to try and push a full 30 round mag in with the bolt closed. The XCR mag sits high so bullets feed in a straight line. Full mags dont like being forced in.

Dont shoot nose "to the charging handle"

Dont push up on the bolt release and pull the bolt back at the same time

Dont cut any trigger springs. It gets better the more you shoot it and breaks RRA two stage style after awhile

Get a hex wrench set and take it with you to the range just in case. I havent had a problem with anything getting loose, but better safe than sorry.

Bring a gas tube wrench in case you want to experiment. I shoot mine on gas setting 2 always, but you may want to tweak yours a few times and get a feel for what you like most.

Dont over tighten the folding stock spring. It doesnt lock but the stock doesnt move unless you want it to

Get a camera and take lots of pics after you get it

Lube the hell out of it for awhile.

That is all my advice. I've abused the shit out of my XCR just to see what not to do. Damn tough carbine though

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1 - 20 of 48 Posts

Chef Dennis

· #2 · Aug 19, 2007

i have read VB's post in more then one forum under a few different names, he knows his stuff! I took a while in deciding to buy a AR type weapon and finally figured , "forget an AR type , and get the best" after months of research and reading VB's post and this Thread also:

http://www.ambackforum.com/viewtopic.php?t=20257&postdays=0&postorder=asc&start=0

Between VB & this BRAVO762 guy, they convinced me! Hope we will see each of them here!

UDT

· #3 · Aug 19, 2007

tzoid, read it on the SIG forum also. Good info glad you posted it here for others to read.

NakedGOBLiN

· #4 · Aug 20, 2007

tzoid said:
Dont push up on the bolt release and pull the bolt back at the same time

Does anybody know why you shouldn't do this?

magikbullet

· #5 · Aug 21, 2007

When I got my rifle, I cleaned it, then lubed it generously with clp. I then blew threw 330 rounds of prvi partizan 55 gr on gas setting 4 with no issues whatsoever.

Phalanx

· #6 · Aug 23, 2007

Hi agian ,i called RA and asked when the new gas system adjustment kit would be avalible ,They said 3 to 4 weeks .Also ,i am an Old H&K fan ,i have owned every model they ever made 91,93,m5,sp89. I have also owned about all the sporting rifles ,some of you may remember them ,770,630,300,270 .my point is all the sporting rifles had a rubber recoil buffer in them just like my XCR. gentalmen ,this was the weak spot in the rifles.in the 770 and the 630 these buffers went downhill in about 4 years ,began cracking ,i had the insite to order spares ,good thing ,H&K stopped makeing the buffers when they stopped makeing the rifles in 1988.i have had people beg me to sell them a $10.00 buffer at any cost ,because they couldnt use their rifles anymore safely.I love the XCR rifle ,but this is a word of caution if you intend on keeping it ,exposed to hammering ,solvents,oil ,and time ,the buffer will deteriorate .

SigsRule

· #7 · Aug 30, 2007

Where in the XCR is this rubber recoil buffer?

Master of Scholastics

· #8 · Sep 12, 2007

I'm all for lubing the XCR, but where? Since I've never owned this type of rifle, I don't know what parts to oil and grease. Can someone help or direct me to a source?

Also, can someone answer SigsRule question regarding the rubber recoil buffer? Should I get an extra one, if possible, for down the road?

magikbullet

· #9 · Sep 15, 2007

SigsRule said:
Where in the XCR is this rubber recoil buffer?

It's on the back of the receiver and sits right in front of the stock...

magikbullet

· #10 · Sep 15, 2007

Master of Scholastics said:
I'm all for lubing the XCR, but where? Since I've never owned this type of rifle, I don't know what parts to oil and grease. Can someone help or direct me to a source?

Also, can someone answer SigsRule question regarding the rubber recoil buffer? Should I get an extra one, if possible, for down the road?

lube the bolt, lube the bolt carrier rails and the rails inside the upper on which the bolt carrier slides...

Master of Scholastics

· #11 · Sep 16, 2007

Thanks for the lubing info. My XCR is on its way to the FFL place in Katy. I hope to get it Monday or Tuesday.

Phalanx

· #12 · Sep 20, 2007

Hi Guys ,As for the buffer on the XCR ,the only reason i bring this up is because i have owned buffer rifles before .And as to another post ,DO NOT FIRE THE RIFLE WITHOUT THE BUFFER!!! What we all have is a rifle we really like here ,but it is a new type and only time will show any trouble the guns may have. Already the fireing pins and gas systems are being changed ,and as time goes on other things may change also. But a floating buffer like these have has been discarded way back in the 80s by several manufacturers .H&K on their older rifles such as the 91 and the 93 finally went to a buffer that was spring loaded somewhat like you see in a Cetme ,or the buffer was bolted in on a counter sink to prevent movement.I am not the only old timer that has noticed this in the XCR ,and i have had a lot of them comment on it.Sure some guns shoot for years with no trouble ,but then you get one that the buffer gets waded up in the action. H&K wouldnt even talk to you about the older guns ,and wouldnt sell replacement buffers for them because they stopped makeing them .Then out of the blue they started makeing them and makeing sure you got one or two ,rumor is it became a liablity problem for them ,i wonder if someone was injured from fireing a gun with a bad buffer or one that no longer had one in it.

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overrun

· #13 · Sep 22, 2007

Why design a combat rifle in such a way that it could possibly become inoperable if buffer came apart or got broken? I'm still hopeing Alex will shed some light on if XCR was tested with buffer missing.

If XCR must have a buffer to operate that's fine. I would just like to know if buffer was destroyed, can rifle still be fired in a combat situation without damage or saftey issues?

Fly OuT

Aussie Arms

· #14 · Oct 1, 2007

How many people have tried the Miltech-1 lube. I love it after a good customer put me onto it. It is synthitic and is supposed to bond to the metals upon heating up and create a synthetic barrier to further restrict wear.

tinman

· #15 · Oct 1, 2007

i will be using "machine gunners lube" by Larue to break in my XCR. i have been using it on my sig p226 w/out any problems.

TEXAS SOLFTAIL

· #16 · Oct 1, 2007

I used Mobil 1, 15w-50 fully synthetic on break in. Super slick even at 5,000 RPM'S. Bolt had no ware marks after 360 round break in.

Aussie Arms

· #17 · Oct 1, 2007

I didn't even think of that. Do you dunk or smear to get bet coverage during break in?

TEXAS SOLFTAIL

· #18 · Oct 1, 2007

Smeared bolt, not where it was running & coated bolt carrier with cleaning rod.

Aussie Arms

· #19 · Oct 1, 2007

Thank You! Go figure, Mobile 1, that's what I use in my truck :

Mike

· #20 · Oct 23, 2007

We know that the break in period is critical on the XCR.
On my rifle the break in was closer to 500 rounds than the 350 recommended. In view of that my question is :
1. How will parts in an upper already worn in for .556 be affected by breaking in a new bolt carrier/bolt of a different caliber, (7.62X39)?
2. (After breaking in the new bolt carrier/bolt), when the caliber is switched back to the old bolt carrier/bolt (5.56), what kind of problems might that cause?

Seems to me that there is going to be issues in one instance or the other, or maybe both.

What do you think?

MikeD

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