BeaverMeat
CGN Ultra frequent flyer
- Location
- Nanaimo, B.C.
That's a steep loss considering the price of new!
Is there any mods to be done with the barrel retention screw without loctite?
FAMAE SG 542 or XCR-M
- Thread starter BeaverMeat
- Start date
That's a steep loss considering the price of new!
Is there any mods to be done with the barrel retention screw without loctite?
That is a steep loss ... good prices for like 4-5 years ago dude is loosing at lot at 2200, if he sells near that. No mods required, just make sure the barrel is torqued appropriately.
LordEvilPepper
CGN Ultra frequent flyer
- Location
- Under a rusty barge in BC
if set to proper torque you will never have an issue.
you need a good torque wrench in inch lb. Do not ever set it "mechanic tight" not tight enough and the barrel comes loose your group is #### and can even cause catastrophic failure conditions. To tight you risk stripping it and you can get weird barrel harmonic issues when it warms up causing the notorious xcr wingers.
BeaverMeat
CGN Ultra frequent flyer
- Location
- Nanaimo, B.C.
Not buying the one off the EE currently. 0% rating is too much risk when sending $1K+.
I'm patient.
I'll middle man it for you if you want it. I'll meet him face to face in Edmonton and then send you the rifle for actual shipping cost. No charge for my time. Low risk and you can give him his first trader rating.
shortrange
Member
- Location
- Sofa, usually. . .
X2 on that. I bought the FAMAE for that reason alone. It is a great gun.
This.
One is a mil-spec battle rifle, the other is a mall ninja toy not adopted by any military or security force anywhere. I know which one I think is better value for money.
LordEvilPepper
CGN Ultra frequent flyer
- Location
- Under a rusty barge in BC
I would put my money on the XCRM outlasting a Famea anyday
"Mechanic tight" is torqued with a quality certified torque wrench as per manufacturer's specification. Anything less is unacceptable. I didn't spend 4 years of school and apprenticeship and well over $100000 to have my trade lumped in with backyard weekend warrior bush league crap. I rebuild an ISX this week and everything was done as per manufacturer spec, and triple checked. My trade is a lot more technical than tossing a barrel on and torqueing one set screw. Good day to you sir! I'm not mad... just disappointed. Lol, but on a more serious note, when I switched my XCR barrel to 6.8 the conversion barrel was a much tighter fit than the 223 barrel, it seems to have gained accuracy since the switch. I wonder if some locktite bearing mount compound on the barrel to receiver could take some possible movement out for a looser fitting barrel? Would make changing barrels tougher (may need heat to remove) but might be worth a try for those with accuracy issues or barrels coming loose. Use sparingly, a little will go a long way.
LordEvilPepper
CGN Ultra frequent flyer
- Location
- Under a rusty barge in BC
Lots of mechanics I Know... trained red seal mechanics use terms like 3 finger tight, stand on it tight, "torqued on"( aka the most the impact will do), hand tight, and snug. They never use a torque wrench for anything, not even for head bolts, pinions, tie rod ends or other critical things.
THe XCRM must be set to 250 inch pounds (updated spec from factory, not in the published 2012 manual) , period, full stop. I can't count the number of guys Ive met at the range that just put that bolt in till its "snug" or "feels like its about to strip" then ##### about the grouping, or heaven forbid the barrel coming loose.
If you need locktight on a XCR platform barrel retaining screw you have done something wrong.
What am I thinking? Commercial spec aluminum stuff outlasts mislspec steel stuff all the time.
Nobody has adopted the xcr because it's too awesome. Clearly.
If you need a torque wrench to assemble your battle rifle in a way where it will be reliable then it has a design flaw.
You need a torque wrench to assemble an AR. That said people generally don't swap barrels in the field.
LordEvilPepper
CGN Ultra frequent flyer
- Location
- Under a rusty barge in BC
only a bunch of third world countries adopted the 540 series (which was primarily 5.56) and france who very quickly replaced it. And the 542 is currently made and used by one country: chile..... Even the inventors passed it over and went back to the drawing board
The XCR-m was disqualified from the SCAR program because they showed up for a trail day without a BFA... because nobody told them it was required... aka the old boys club forced them out. Also robinson arms isn't a very big company, which was a major factor as well.
You only need a torque wrench for one bolt, and that's if you swap barrels. Robinson arms provides you with instructions for field expedient barrel changes without a torque wrench. Most guns require you to set to torque the barrel, or barrel retainer. You only have to take the barrel off to swap calibers so saying its a deal breaker or unreasonable is silly.
As for the aluminum receivers. AR receivers are al (7075), ACR are AL to. Man modern firearms currently in use are AL.
milspec means nothing, there is so many different types of AL and they all have different properties. Military spec could mean "the minimum requirement for min expectations" which could be a very low bar to meet. Or you could be talking "aircraft" grade part which actually means something for quality, although that too is a fairly broad "standard". As the army(s) uses a lot of different types of AL, with a lot of standards, "mil-spec" is overall, meaningless and a feel good consumer catchphrase.
If you want to compare 6061 vs 7075 that means something. For example 7075 might be stronger, but if you need to weld on it you are probably going to use 6061 for ease, and expediency. However in any given application you have too look at hardness required, if you're casting or milling, forming or welding, conductivity, corrosion resistance, etc... the "strongest" may very well not be the right material for the job.
Um... what user-interchangeable part of an AR need a torque wrench? Pray tell? AR barrels are NOT intended to be swapped around, complete uppers are. Last I checked it was 2 push pins.
Robarms has been trying to get a military contract since their "expeditionary rifle" with no success. they don't even have an LEO contract - they are strictly a commercial outfit. We have pages and pages of threads here talking about the XCR and loctite, wandering zeros, the need to run it super-wet, etc. None of it is confidence insipring and I cant imagine they would do well in US ARMY trials at Aberdeen.
Yes, the wrench is only needed for barrel swaps - that would not be a big deal if Robarm wasn't pushing barrel swaps as THE key selling feature (i.e. the "killer app") and putting out literature saying how it's a user-change design feature, can be done in the field, etc.
The SG542 is a licensed copy of the Swiss Arms family of rifles, built using the SA Technical Data Package for the weapon. Sure, few countries buy the Chilean variant, but why would they when they can have the Swiss gun for a small price differential? The SG540 (military version of the 542) and the SG550 are almost identical rifles with only minor evolutionary differences - differences we are thankful for, else the 540 would be a named prohib variant in Canada (much like the XCR likely will be when the next Liberal gun law rolls out).
An interesting fact, the SG540 evolved to the SG541. The SG541 was re-named to the SG550 - the current Swiss service rifle - the only changes being some stamping operations differences to allow for full-auto fire. The SG542 came out AFTER the 541, but is just another semi-auto only version of the SG540 currently license built by FAMAE.
Bottom line - in semi-auto, it's the same design, just made in a different facility. One can argue the Swiss guns are better assembled also.
By the way, I work in the defence industry as an engineer. Milspec most certainly does not mean nothing. I would suggest you google military materiel certification, Non-destructive examination, objective quality evidence, ISO 9000 series standardization, Canadian Forces Technical Orders (CFTOs) and the MIL-STD family of standards that underpin military materiel specifications. If milspec meant nothing, you could cut the DND materiel acquisition budget in half tomorrow
I've done first article testing in the field for CAF gear - believe me, there are lots and lots of "also rans" like the Robarm when it comes to military procurement. And that's a good thing - people's lives hinge on reliability and performance.
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Obviously the barrel, you could just swap uppers on an XCR as well, so in changing barrels a torque wrench is needed. An ar barrel is a user interchangeable part, and they are swapped around all the time, especially if you get a pre headspaced barrel and bolt set up. It's just harder than an XCR.
LordEvilPepper
CGN Ultra frequent flyer
- Location
- Under a rusty barge in BC
Im a mat tech i know all about cfto's
Most "mil spec" materials are just commercial grade, that often have arbitary standards (that commercial grade material aready meets)slapped on for 3 times the price.... its not voodoo magic. Astm standards for materials production are generally high enough for our equipment.
Cftos just tell you what material to use and what needs to be done to put it together properly.
Most "mil spec" materials are just commercial grade, that often have arbitary standards (that commercial grade material aready meets)slapped on for 3 times the price.... its not voodoo magic. Astm standards for materials production are generally high enough for our equipment.
Cftos just tell you what material to use and what needs to be done to put it together properly.
