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AICS owners is this normal???

Niles Coyote

Niles Coyote

Gunny Sergeant
Full Member
Minuteman
    • Aug 13, 2007
    4,630
    1,568
    South West, MI
    I am new to the AICS chassis and specifically, I have a AICS 2.0 SA. I noticed when the action is torqued to recommended torque (somewhere around 53 inch pounds) if I loosen the front action screw the front of the action lifts indicating that is not stress free like I am used to in my conventional stocks.

    Is this something to be concerned about or just normal to this stock type. It does it on both my Remington action and my Stiller action...
     
    I have not tried this on mine. It is a LA 2.0 but I have heard of some people using a small amount of bedding material around the tang and the tenon for extra support.
     
    I think it's fairly common, I would like to send mine off to Chad at Longrifles and have it surface machined. I think he needs a group buy on that service ;-)
     
    Niles Coyote said:
    I am new to the AICS chassis and specifically, I have a AICS 2.0 SA. I noticed when the action is torqued to recommended torque (somewhere around 53 inch pounds) if I loosen the front action screw the front of the action lifts indicating that is not stress free like I am used to in my conventional stocks.

    Is this something to be concerned about or just normal to this stock type. It does it on both my Remington action and my Stiller action...
    Click to expand...

    maybe i missed it in the instructions, where does it say to loosen the front screw while keeping the rear tight?

    follow the instructions that came with it and it will be just fine.
     
    Hey NC I'd shoot it, and if accuracy isn't like it was I'd have something done about it. This is one reason I haven't gotten a chasis yet. For over a grand, you would think it would be 100% stress free, but that's just me. I guess I'll be looking at the Manners mini chasis. BTW I was talking to Jon Beanland, and he was telling me a story about a 22-250 that was so stressed it would move the action all over the stock, and really shouldn't shoot, but was as accurate as any rifle he'd saw. Torque it, and compare groups. Good luck
     
    Mine showed atleast a 1/2-3/4" rise when i did that to mine. Immediately bedded the rear tang and that took care of it. Alot of the big name smith's on the hide recommend atleast bedding the rear tang(sac,gap,rw,and la, to name a few). Some guys get by with out and others,like myself, try to avoid loading up stress in the receiver. Mine is a remage that shoots 105 hybrids @3175fps into itty bitty bugholes from a bipod .
     
    Yea Jon just called me Niles, and he said "DON'T tighten that rear screw to 53 "lbs or you could, and "WILL" bend the rear tang. He said just tighten to 20" lbs, or bed the rear tang area, which was a piece of cake and you'll be fine. But never tighten that rear screw that tight, unless you bed it 1st, or you will bend the tang.
     
    Why is this an issue? It sounds like you are looking for a problem where there isn't one. Tighten it down and shoot it and see what it does. If you have a problem after, then look at bedding it. I will bet a beer you won't have a problem and or need to bed it.
     
    65 inch pounds used to be the advised torque, even at that, never saw any issues with what has been advised-torque and shoot.
     
    groundhogbuster said:
    Yea Jon just called me Niles, and he said "DON'T tighten that rear screw to 53 "lbs or you could, and "WILL" bend the rear tang. He said just tighten to 20" lbs, or bed the rear tang area, which was a piece of cake and you'll be fine. But never tighten that rear screw that tight, unless you bed it 1st, or you will bend the tang.
    Click to expand...
    Over the years I've owned 6 or so ACIS stocks. This is the first I've heard of any issue with bending a receivers tang .
     
    It will stress the rear tang. The tang is floating over the V. You probably won't actually see it bend with your eye and honestly i have never put an indicator on the tang when tightening the screw. I just know the front end will rise if the tang is not bedded. Its just better to bed the tang or not tighten it to the recommended torque. Thats just my opinion and yea i know a lot of um shoot good torqued to spec.
     
    300sniper said:
    that's not important. what is important is that it doesn't do something funny when you do something to it that was never intended to be done....
    Click to expand...

    No, I didn’t set out to look for problems but I was trying to diagnose why a rifle that would shoot well in a conventional stock was throwing shots 1-2 moa out in outer space from the main group. I put my own rifle together (first time) from parts and thought I had something F’d up but when a consistent shooter replaced this barreled action and was still shooting unexplained fliers I started looking as to why.

    The front of the action jumping up and off the chassis when the front screw was removed was what I thought may be a clue...
     
    beanland said:
    It will stress the rear tang. The tang is floating over the V. You probably won't actually see it bend with your eye and honestly i have never put an indicator on the tang when tightening the screw. I just know the front end will rise if the tang is not bedded. Its just better to bed the tang or not tighten it to the recommended torque. Thats just my opinion and yea i know a lot of um shoot good torqued to spec.
    Click to expand...

    Thanks beanland for your insights... I’ll be bedding
     
    I was in the same boat a month or so ago when I dropped my AAC-SD into an AICS AX chassis, I torqued it to 57 in/lbs, the closest to 6 nm that my Borka wrench had and the quite frankly the rifle shot like hell. I'd be lying if I said I didn't freak a little bit because I paid out all of this coin and the rifle, which shot pretty good in a B&C stock is now shooting patterns in the 2" range with no consistency. I ended up re-torqueing the action screws to 65 in/lbs and the accuracy improved greatly and has stayed pretty consistent with groups in the .6-.7 range for the most part using M118LR and Federal GMM.
     
    No, I just torqued the action screws to 65 in/lbs, no bedding. This is pretty much how my AAC-SD shoots in the AX chassis at 65 in/lbs, bent tang and all. The Shoot N C is nine rounds in a hair over .7 MOA. I could bed it and possibly see an improvement but it's not a big priority right now.

     
    Last edited:
    Devcon is curing. I got a little barrel pad going on, a pinch behind the recoil lug for full contact and a little around the rear action screw while it is floating. I will update with results.
     
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