Accuracy International Picture Thread

Good point, the low rail may use reduced head height socket head screws or flatheads so they don't stick up above the rail, while the high rail might use regular full height head socket head screws since there's plenty of room for a deep counterbore. Much like button head screws, the reduced height head screws have lower max torque values than standard full height head socket cap screws.

I don't have my ATs anymore and even then I never had the high rail, so I don't know if the hardware was different. Earlier I was citing the page out of the 2015ish AT armorer's manual that only lists 3.0 Nm for the scope rail screws; no mention of high or low rail.
Rail gets here today! I will let you all know.
 
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When I posted that the other day about the High vs Low, I had just called MH and asked John in sales, he put me on hold, asked one of their AI armorers (wasn’t Adam, he wasn’t working that day) and that is the info I got. He said the armorer checked his current manual and that’s what it said.

I know I used 35” lbs on my High rail on my AT and worked just fine, with a drop of Blue 243 on each SHCS.
 
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When I posted that the other day about the High vs Low, I had just called MH and asked John in sales, he put me on hold, asked one of their AI armorers (wasn’t Adam, he wasn’t working that day) and that is the info I got. He said the armorer checked his current manual and that’s what it said.

I know I used 35” lbs on my High rail on my AT and worked just fine, with a drop of Blue 243 on each SHCS.
Thaks for that information. Got the rail today. Stay tuned for the install or me crying for help... :ROFLMAO:
 
Thaks for that information. Got the rail today. Stay tuned for the install or me crying for help... :ROFLMAO:
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When I posted that the other day about the High vs Low, I had just called MH and asked John in sales, he put me on hold, asked one of their AI armorers (wasn’t Adam, he wasn’t working that day) and that is the info I got. He said the armorer checked his current manual and that’s what it said.

I know I used 35” lbs on my High rail on my AT and worked just fine, with a drop of Blue 243 on each SHCS.
I talked to AINA about switching to torx screws a while ago and what I was told was that previously the AT low rail (probably the high rail too but I don't know for sure) used countersunk 2.5mm hex screws and sometime in 2023 they upgraded everything to 3mm hex socket cap screws and made the corresponding changes in the rail (P/N 26981 vs P/N 26980). I would guess this also led to a change in the torque spec as I used 35in*lbs for the old 2.5mm screws and they held fine but rounded out as soon as I tried to remove them, thank God for the left handed drill bit.
 
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I talked to AINA about switching to torx screws a while ago and what I was told was that previously the AT low rail (probably the high rail too but I don't know for sure) used countersunk 2.5mm hex screws and sometime in 2023 they upgraded everything to 3mm hex socket cap screws and made the corresponding changes in the rail (P/N 26981 vs P/N 26980). I would guess this also led to a change in the torque spec as I used 35in*lbs for the old 2.5mm screws and they held fine but rounded out as soon as I tried to remove them, thank God for the left handed drill bit.
Yea you gotta really heat up the factory ones and my experience is like yours that's def a single use screw
 
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I talked to AINA about switching to torx screws a while ago and what I was told was that previously the AT low rail (probably the high rail too but I don't know for sure) used countersunk 2.5mm hex screws and sometime in 2023 they upgraded everything to 3mm hex socket cap screws and made the corresponding changes in the rail (P/N 26981 vs P/N 26980). I would guess this also led to a change in the torque spec as I used 35in*lbs for the old 2.5mm screws and they held fine but rounded out as soon as I tried to remove them, thank God for the left handed drill bit.
I was wondering about the PN. My rail is 26980, and the low rail available today is 26981. Could not find the difference noted anywhere. Thanks!
 
Glad you posted that. I have the older rail. Any advice about how to properly heat them up for removal?

I don't heat the screw as I want the threads hot, not necessarily the screw heads, especially if I am trying to not soften them. I heat the whole assembly gently with a propane torch until it is nice and hot to the touch. Let it sit a bit and take the screws out then.
 
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My two Coopermatch single shots. One (95 AT) has the Palmamaster inscription, the other doesn't (96 AT). The 95 AT one came as just an action with no trigger shoe. No plans for it and I didn't pay much, so it will just stay that way for now. The 96 AT came in an AE Clarke (English gunsmith) prone stock designed for Coopermatches with a virtually brand new 30" Border barrel. Might use it for Palma/TR shooting, but I have a few other AI Palma/TR rifles anyway, so just part of the collection for now.

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With an IMUNS mount on an AW, how do you pull the bipod swivel far enough out to get the sling plate out?
Remove the 8mm roll pin and bipod stud. With straight blade screwdriver wedged between the spigot and fore end frame (using the round bipod stud opening), push the spigot forward. A rubber disc between the spigot and sling mount holds the sling mount in place and keeps it from rattling.

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What reason is there that the Imuns for the AW doesn't fit the AT? To me those pieces look similar enough to work.
Having just gone through this:

1. The AW imuns extends too far into the chassis and blocks the use of the small forwardmost skin screw by about 1/4”-1/8”(not really an issue and easy fix if you cut some clearance)
2. The AW imuns is not tapped for QD cups
3. This seems to be back and forth, but a factory AI barrel is not free floated in an AT with the AW imuns because the top piece of the IMUNS ends up clamping down onto the barrel. I had some 2mm spacers 3d printed to fit the form of the IMUNS and no longer have this issue.
 
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