The KRG X-Ray Chassis uses AICS style magazines so I recommend using the magazines at the link below instead of the C Products Defense 7.62x51mm/.308/6.5 Creedmoor Stainless Steel Magazines.
https://www.opticsplanet.com/accuracy-international-magazine-5-shot.html?_iv_gun-make=tikka
The C Products Defense 7.62x51mm/.308/6.5 Creedmoor Stainless Steel Magazine will not work in a Tikka T3X CTR. From what I have read Tikka makes a proprietary magazine, so I recommend contacting Tikka to see if there are any compatible aftermarket magazines for the CTR.
Yes. The Duramag .308/7.62x51 Stainless Steel AR Magazine will fit, feed, and function in your rifle.
Thank you for your question, unfortunately this magazine will not fit that firearm.
Yes, it is fully compatible with that firearm and we use 716 rifles for our regular testing.
Yes, it will.
No, unfortunately it will not. You will need an AICS style magazine.
The fitment info provided by Duramag for this magazine is that it will fit DMPS LR-308 and SR-25 pattern .308 Win/7.62 NATO AR style rifles. DPMS states that the Gen 1 and 2 use the exact same magazine so there should be no functional difference. It should work with the .243, as the .30 has a greater OAL by a small margin.
You shouldn't have a problem. The Ruger Precision Rifle functions interchangeably with AICS and M110/SR-25/DPMS/Magpul-style magazines.
The fitment info provided by Duramag for this magazine is that it will fit DMPS LR-308 and SR-25 pattern .308 Win/7.62 NATO AR style rifles. DPMS states that the Gen 1 and 2 use the exact same magazine so there should be no functional difference.