Avenger bipod mount help!!!!

[Robert84]

So was shooting my avenger from my table today and realized I have a ton of play side to side and tilting on the bipod mount. It’s a pain in the rear. the pic rail bolts are as tight as I feel comfortable tightening. Has anyone else had this problem and how did h fix it. This is on the cheap plastic stock by the way. And I realized when not paying attention groups are opening up because of this