Quoted:
OK I own both.  I own an M4 Carbine and I own an XCR Carbine.  I have also been in both Gulf wars (multiple tours in Iraq) and If I had a choice while over there I would have chosen the XCR every time.

That being said.  The AR is a good rifle.  If you can keep it, do so.  However, if you want to buy an XCR, you won't regret it.  Accuracy is not a problem with the XCR.  Even after a barrel change.  Accuracy with the XCR averages sub-MOA at 100yds.  Parts are readily available from Robinson Arms and they are very affordable.  Don't let anyone tell you that Robinson may not be around in a few years.  If that is the case then that can be said for any of the AR manufacturers. ...But there will still be AR parts from someone around even if your brand is gone.

No onto the XCR.  Here is why I purchased one and wished I had it when I was in battle:

1. The same reliability as the AK-47.
This hasen't been proven by the test of time.

2. Same modularity as the M4.  I can fit anything on the XCR I can with the M4.
To an extent. There is a far more vast selection of upper/lower configurations available for the AR platform.

3. Bigger and better bolt.  
Bigger yes, better...maybe.

4. Gas Piston.  GP is not just to reduce cleaning.  I can adjust the gas on the fly to reduce ammunition problems.  If I got a batch of ammo that is weaker than the last, I can crank the gas up and not have to think twice about the ammo.  If I have a silencer, I can crank the gas all the way down.
This is the one real advantage to the piston system.

5. Solid ejection system.  Ejector will not break.
Never had an ejector fail on an AR. There have been KBs shown on this site that have done some damage to them though.

6. Stronger Extractor.
True

7. Charging handle is located in a better and more ergonomic position.  No need to change your position so you can charge the weapon.  You can look through the optic while charging and never taking your eye off the target.
Um...when do you need to use the charging handle that does not involve changing mags or correcting a malfunction?
Being able to use the charging handle while maintaining a cheek weld isn't much of an advantage, as pulling the charging handle will throw you off target anyway.

8. I can operate nearly every function of the gin with the trigger finger such as dropping the mag, locking or releasing the bolt.  
The ergonomics of the AR are just fine. You release the bolt with the same hand you just inserted a mag with. You lock the bolt with the same hand you're removing a mag with. The remainder can be operated with the firing hand without removing it from the firing position.

9. Better selector switch.


10.  Just better all around.  


That are just some of the reasons I preferred the XCR over the M4 in battle.  I also prefer the XCR in the civilian world because I can change out the barrel and bolt and have a completely different caliber gun.  You show me an AR that can fire all the calibers, buy just simply changing out a bolt and barrel in a matter of 5 minutes: 5.56, 6.5, 6.8, 7.62x39.

You can't.  
Yes I can.
With the push of 2 pins, & throwing on a different upper, I can accomplish a caliber change in under 1 minute with an AR. The receiver is only about 7" long, and having it fixed to the barrel means 'no loss of zero' for the different caliber. Can an XCR give you that?

I have well over 6000 rounds (closer to 7000) and I have not once cleaned the chamber, receiver, bolt/extractor.  Try that with a non-gas piston M4.
You can't.  If you tried it in battle you would be dead.  I hated having to clean my weapon all the time.  But I knew I had to so I could make it home again someday.
You haven't read what testing is done to the M4s coming out of the factory have you. They pull a set percentage of M4s from the line and perform a 6000 round endurance test. I'll bet that the time to fire these 6000 rounds is significantly less than the rate of fire you have achieved with your XCR.

Just try any of that with the AR-15 and see how well it works out. I bet you go buy an XCR.  You can order one straight from Robinson Arms and have it delivered in about 8 weeks.  Get it the way you want it too.  Try that with LWRC, Sabre, LMT, DPMS, BM, Stag, or anyone else.  They are 1+ years backordered.  

Do yourself a favor and buy an XCR.  Most of the people on this forum have never fired an XCR so they are most likely biased.  Ask the guys on the XCR forum who own both and they will tell you why the prefer the XCR to the AR.

AR-15 =

XCR =

DISCLAIMER:  The AR platform has served America and some of it's allies for over 40 years.  It is a great weapon system.  No doubt about it.  However, it has it's drawbacks and that is why many of America's allies have adopted other systems most of which are Gas Piston operated just like the extremely reliable AK-47.

...and don't forget the more complicated break-down procedure for the XCR, I've done it, and you can't deny that it is more intricate than the AR. Which is a draw-back in a combat weapon IMO.

Quoted:
Here is a +1 post for the XCR.  If you are stuck in your AR ways then stop reading here.

I am a big AR fan, and the AR system is what I am most familiar with, but the XCR is so much more of a gun.  

A piston just runs much cleaner and much cooler than a DI.  Shoot 200 rounds from an XCR and there is really nothing to clean, unlike an AR which is filthy.  In general, a clean gun is a more reliable gun, if you can't accept this then I don't know what else to say.

XCR has quick caliber and quick barrel changes.  Just an allen bolt and you can basically go from Carbine to PDW to 6.8 SPC to 7.62x39 in an instant.

XCR has a monolithic railed upper.  How much are railed mono AR uppers?

XCR has a folding stock, something an AR can never have.

XCR has the charging handle where it should be.  Like the FALs of yesterday, and the SABRs of tomorrow.

XCR has an adjustable gas system that can ease the harshness of suppressor or hot ammo, or can give more oomph for weak ammo.  Say bye bye to gas blow back in the face when running suppressed.

Some guys are stuck on the Garand, some guys stuck on their M14, and some guys are stuck on their overweight and poor handling 65 Mustang.  Therefore I have no doubt there will be AR guys stuck in their AR ways.   Nothing in the law that says you have to move forward.

Quoted:
I am a die hard AR fan.

No argument put forth by XCR folks - even if I take everything they say at face value - will convince me to buy one.

Most arguments are prefaced with attacks on the standard AR system, which I believe to be the finest rifle in the world.

I have extensive trigger time with Colt M4s, including 11 months on a Marine PSD team in Iraq, and did not need to clean it when I should have been sleeping (that's what I had the SAW for), nor did I ever feel the slightest bit worried about its reliability. I did have one malfunction, a brand new weapon with no lube (none at all) went for 850 rounds before I had a stuck case. That's 4 times more than I carried on my person. I could have fired every 5.56 round carried by every Marine in my M1114 and not have to worry about the weapon malfunctioning. I wasn't big on weapons maintenance then and I'm not now. I cleaned my M4 when the outside turned brown - still never failed me in Iraq. I just cleaned my Kimber Custom II for the second time ever - I've got about 8k through it - zero failures.

I don't give a flying fuck about monolithic uppers, been there, done that, owned them, sold them. I don't like unnecessary weight. I shoot two calibers, 5.56 and 5.45. I have never spent $1700 on an AR in my life, in fact, between my S&W 5.45 upper'd gun and my BCM upper'd gun I haven't spent $1700, including Aimpoints. I've owned somewhere over 30 AR-15s, never saw the need to spend $1700 for something with no optic. I did build a 6.8 AR with a Vltor VIS, stainless barrel, 2 stage trigger, Magpul stock, blah blah blah, I think I had $1400 in the rifle.

Oh, I think it's funny for someone to say that a 65 Mustang is overweight - pretty ignorant - my 68 Mustang is lighter than my 04 Mini Cooper.

Quoted:

[SNIP]

Oh, I think it's funny for someone to say that a 65 Mustang is overweight - pretty ignorant - my 68 Mustang is lighter than my 04 Mini Cooper.

Quoted:
Wow, I guess you missed the part where I said I have a 2004 Mini. If it makes you feel any better, I have a newer Mustang Cobra too. Moving on...

So I guess the incorrect price comparisons YOU made are immaterial, while the incorrect price comparisons I made are a crime against humanity?

Oh, here's a cold hard fact for you, newer does not necessarily mean better. No Robinson Arms product will ever be adopted by the military, there are better designs out there. I was recently comparing an XCR to a SCAR and...well, there is no comparison, the SCAR is superior in every way.

Quoted:
in fact, between my S&W 5.45 upper'd gun and my BCM upper'd gun I haven't spent $1700, including Aimpoints

Quoted:


BULL

Unless you get everything at cost. In that case, so what?

Why the need to exaggerate?

Quoted:

It does the same job and is lighter. It has proven itself to be exceptionally reliable in extreme conditions. SOCOM weighed the XCR and the SCAR and other designs, the XCR was found lacking. Technicalities my ass.

Quick barrel changes are a gimmick to sell guns.

Yet another incorrect price from you, MSRP is well below $3000, already prices have fallen to reasonable levels and people on ARF have gotten them for ~$2600.

Quoted:


How is the SCAR better?  quicker barrel change? shoots the same ammo faster? runs cleaner? folds up smaller? can make you jump higher?  Or it is better price?
SCAR $3000
XCR $1500 ($1700 if you add sites)
That's if you can get the SCAR for $3000

Glad to see you can move forward with cars, why another Mustang though? Because it says Mustang on the side?  Would you buy an XCR if Robinson put "AR" on the side?

Quoted:

Until they come out with 5.45 barrels (or have they already?) it will be of limited use to me. Even then, I prefer separate weapons, not separate uppers or barrels.

SOCOM has had SCARs for quite some time, and they like them, but they don't spend a lot of time on the internet talking about it.

It does a similar job and is significantly lighter. No, I don't need to hit the gym, I had a SAW and a M32 in addition to my M4, but every bit of weight counts, and the SCAR amazed me, I couldn't build a comparable AR that light.

Again, I've never spent that much on a rifle and I doubt I ever will. I will, however, play with the SCAR at work without complaint.

Quoted:

But I can't pick up my "two" rifles, hand one to a friend or relative, and go shooting, unless they toss the rounds in the air and try to hit them with the conversion barrel baseball-style...

All I can say is I picked them up back to back and noticed quite a difference.

I have a 6.85lb AR (that's including an EOTech, VFG, BUIS, Surefire, and railed forend) and the SCAR felt lighter than that.

http://www.azbattlerifles.com/images/slw.jpg

According to RobArms website, XCR-L weighs 7.5lbs unloaded.

Quoted:

But I can't pick up my "two" rifles, hand one to a friend or relative, and go shooting, unless they toss the rounds in the air and try to hit them with the conversion barrel baseball-style...

All I can say is I picked them up back to back and noticed quite a difference.

I have a 6.85lb AR (that's including an EOTech, VFG, BUIS, Surefire, and railed forend) and the SCAR felt lighter than that.

http://www.azbattlerifles.com/images/slw.jpg

According to RobArms website, XCR-L weighs 7.5lbs unloaded.

Quoted:



Your gun should be in the Guinness book of World Records, I have never seen an AR that light weight with all those accessories.  Since weight = mass x gravity, I am thinking the mass of your gun is the same as mine but the gravity pull in your house must be less than mine, hence why it is so light.

I do agree the point that some gun just feels lighter than others when shooting.  When shooting side by side with my AR (both guns have HB), the XCR does feel heavier even though both are about the same weight.  But this is only noticeable when shooting side by side.

Quoted:


BULL

Unless you get everything at cost. In that case, so what?

Why the need to exaggerate?

Quoted:


How is the SCAR better?  quicker barrel change? shoots the same ammo faster? runs cleaner? folds up smaller? can make you jump higher?  Or it is better price?
SCAR $3000
XCR $1500 ($1700 if you add sites)
That's if you can get the SCAR for $3000

Glad to see you can move forward with cars, why another Mustang though? Because it says Mustang on the side?  Would you buy an XCR if Robinson put "AR" on the side?