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Thread: Movement in upper and lower

  1. #11
    Rifleman shortfal's Avatar
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    Re: Movement in upper and lower


    I made a pin out out of drill rod to replace the pivot pin on my XCR that is a full .250 diameter and a washer out of shim stock for the upper/lower joint.
    That got rid of play at the front and helped with the updown at the back. Mine has very little play now.

    This might be a little out there, but you could prep the part of the recoil rod that locks the upper to the lower at the rear and spray multiple coats of GunCote on it, building it up a few thousandths. It'd take alot of coats though and you'd have to bake it to cure the GunCote. Best to remove the spring as the baking temp would likely hurt it.
    Pete



  2. #12
    Newbie Canuck XCR-M's Avatar
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    Well, digging up a 7 year old thread but I just bought a NEW black XCR-M /308 with competition length keymod and kinda shocked at the play/wobble between the upper and lower. Expected more from a $3500+ rifle .. over $4000 after tax and shipping in Canuckistan. I'd have just sent it back to Wolverine but waited a looooong time for this thing and wasn't keen on spending another $100 on shipping it back and forth .. for nothing likely I figure. I don't think it came from RA like this as Wolverine just puts them together as needed. You guys ever figure out an acceptable method to tighten this up besides tape on a rifle of this cost? Love the rifle, it's NON-Restricted and all but this poor fitment sure puts$ a damper on it and I can see it getting worse as the rounds put through it pile up.

  3. #13
    XCR Guru Sean K.'s Avatar
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    Quote Originally Posted by Canuck XCR-M View Post
    Well, digging up a 7 year old thread but I just bought a NEW black XCR-M /308 with competition length keymod and kinda shocked at the play/wobble between the upper and lower. Expected more from a $3500+ rifle .. over $4000 after tax and shipping in Canuckistan. I'd have just sent it back to Wolverine but waited a looooong time for this thing and wasn't keen on spending another $100 on shipping it back and forth .. for nothing likely I figure. I don't think it came from RA like this as Wolverine just puts them together as needed. You guys ever figure out an acceptable method to tighten this up besides tape on a rifle of this cost? Love the rifle, it's NON-Restricted and all but this poor fitment sure puts$ a damper on it and I can see it getting worse as the rounds put through it pile up.
    Newer XCRs (M or L)...aren't that loose....

    Do you have any feeler gauges to give an idea of how big the gap between the upper and lower actually is?
    "Necessity is the plea for every infringement of human liberty. It is the argument of tyrants; the creed of slaves."-William Pitt the Younger

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  5. #14
    Rifleman xdmer's Avatar
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    Mine was never like this, and I would question it's assembly if Wolverine did build it, contact them. How much pressure is there on the return spring and how's the lockup there? How is the take-down pin?

    Quote Originally Posted by Canuck XCR-M View Post
    Well, digging up a 7 year old thread but I just bought a NEW black XCR-M /308 with competition length keymod and kinda shocked at the play/wobble between the upper and lower. Expected more from a $3500+ rifle .. over $4000 after tax and shipping in Canuckistan. I'd have just sent it back to Wolverine but waited a looooong time for this thing and wasn't keen on spending another $100 on shipping it back and forth .. for nothing likely I figure. I don't think it came from RA like this as Wolverine just puts them together as needed. You guys ever figure out an acceptable method to tighten this up besides tape on a rifle of this cost? Love the rifle, it's NON-Restricted and all but this poor fitment sure puts$ a damper on it and I can see it getting worse as the rounds put through it pile up.
    Last edited by xdmer; 08-17-2017 at 08:30 PM.
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  6. #15
    Newbie Canuck XCR-M's Avatar
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    Yeah being a brand new model I didn't expect the play people said was corrected years ago. I figure because I went with the 308 competition length keymod Wolverine likely just pulled a lower off a regular rifle. Got that impression when I ordered it but I don't know for sure .. hard to believe RA would ship that out. I will call them I guess .. had a scope, ADM mount, and a pile of other stuff coming so was anxious to get it set it up and shoot the damn thing after waiting so long, haha.

    There is a LOT of side to side wobble in the front pin area yes, if I open it up just slightly (at take down latch) the lower moves back & forth laterally close to 1/4". Play seems to be mostly in upper lug/hole. When latched if I pull the upper back tight the slop/rattle goes away .. thought I might find a fix here with a new pin/bushing/shim/etc as I knew many older rifles had the issue. I can see a little day light when locked but the fit looks pretty good really, lock up at take down latch/spring is good, spring is good (very firm to depress) and the lug on the end of the spring fits well in the receiver pocket. It's the hole in the take down pin in the upper lug that seems excessively sloppy. I guess a custom worked bushing may do the trick. Never handled another XCR to compare it to ... just didn't expect to be able to shake the rifle holding on to the grip and hear it rattle like a $700 AR. Maybe I just expected too much .. appreciate the replies anyway. Rifle is a blast to shoot and zero issues gobbling up Hirtenberger surplus so far with gas set at 5 .. going to bump it down to 4 and see how it goes. Pretty hot round.

  7. #16
    XCR Guru mjorin's Avatar
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    A rifle that costs that much should not need a custom bushing. I've never had that much wobble in in my older guns. Any word from Wolverine?
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  8. #17
    XCR Guru Sean K.'s Avatar
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    Quote Originally Posted by Canuck XCR-M View Post
    Yeah being a brand new model I didn't expect the play people said was corrected years ago. I figure because I went with the 308 competition length keymod Wolverine likely just pulled a lower off a regular rifle. Got that impression when I ordered it but I don't know for sure .. hard to believe RA would ship that out. I will call them I guess .. had a scope, ADM mount, and a pile of other stuff coming so was anxious to get it set it up and shoot the damn thing after waiting so long, haha.

    There is a LOT of side to side wobble in the front pin area yes, if I open it up just slightly (at take down latch) the lower moves back & forth laterally close to 1/4". Play seems to be mostly in upper lug/hole. When latched if I pull the upper back tight the slop/rattle goes away .. thought I might find a fix here with a new pin/bushing/shim/etc as I knew many older rifles had the issue. I can see a little day light when locked but the fit looks pretty good really, lock up at take down latch/spring is good, spring is good (very firm to depress) and the lug on the end of the spring fits well in the receiver pocket. It's the hole in the take down pin in the upper lug that seems excessively sloppy. I guess a custom worked bushing may do the trick. Never handled another XCR to compare it to ... just didn't expect to be able to shake the rifle holding on to the grip and hear it rattle like a $700 AR. Maybe I just expected too much .. appreciate the replies anyway. Rifle is a blast to shoot and zero issues gobbling up Hirtenberger surplus so far with gas set at 5 .. going to bump it down to 4 and see how it goes. Pretty hot round.

    Open, even slightly, isn't the way to test for wobble.

    Older L lowers, pre-M, were different than newer L uppers.....the spec was changed sometime around the 5K-7K S/N mark to tighten up any slop. I don't believe the -M ever suffered from the slop issue, so swapping a newest version comp upper onto an M lower shouldn't have resulted in the issue....unless RA has made another "tweak" to the spec that we're not aware of (entirely possible).

    Sounds like you just happened to get one that's sloppy. RA will likely want you to actually quantify the slop while it's assembled if you're hoping for a fix.... again, feeler gauges are your friend here.
    "Necessity is the plea for every infringement of human liberty. It is the argument of tyrants; the creed of slaves."-William Pitt the Younger

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