benelli m4 Cannot remove stock bolt from recoil tube spring cap

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Hoping and praying the fine people in this forum can help me. I needed to remove the stock from my Benelli M4 since the stock bolt has become loose. However, the recoil spring cap (the metal piece that you screw in to the end of the recoil tube, and which caps and secures the recoil tube spring) has also unscrewed (and also the spring clip that is supposed to retain the recoil spring cap in the recoil tube) along with the stock bolt. So I now have a detached stock with a stock bolt that can’t be removed or unscrewed from the recoil spring cap and spring clip. I am so frustrated and don’t know what I can do. The recoil spring cap is located deep inside the receiver end of the stock, making it almost impossible to reach and immobilize so that I can unscrew the stock bolt from the butt end of the stock. I have been trying with several long tools that I thought might be able to hold the recoil spring cap steady but to no avail. Does anyone have a viable solution to this crazy problem? Maybe stranger danger can chime in?

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Per the recommendation of a forum member, I called Benelli customer support and got a gunsmith on the line. This was my first time trying Benelli's support and I was pleasantly surprised. The gunsmith said that they've had this issue come up before and said that applying Loctite 271 to the 1st 3 threads of the recoil tube stock end, then screwing in the stock with stock bolt still connected to the recoil tube spring cap, then letting the loctite set for 24 hours. I should be able to unscrew the stock bolt from the recoil tube spring cap. Once this is done, I will need to use a heat gun to loosen the recoil tube spring cap accordingly. Anyway, this is very logical and apparently works. Hope this helps anyone else who encounters this rare problem.

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It worked! I followed the Benelli gunsmiths advice and it worked perfectly. Only let the red loctite cure for about 6 hours but it was enough. Apparently the stock bolt was set in the recoil tube spring cap by blue loctite. Didn’t know that blue loctite was strong enough to require breaking the bond that strongly. Anyway, after finally removing the stock bolt from the recoil spring cap, I just loosened the red loctite by placing the end of the recoil tube over my stove burner for about 7 minutes. That was enough heat to break the loctite and allow me to unscrew the recoil tube spring cap from the recoil tube. After that I needed to scrape the residual red loctite from the threads of the recoil tube and brush out with a bronze barrel brush. With all the parts finally out and brushed and wiped clean, I now applied Vibratite to both the stock bolt and recoil spring cap and let dry for the recommended 30 minutes. Then reassembled everything. Hope that this will be a good fix and that my stock (walnut aftermarket) won’t come loose after shooting 50-100 shells of high brass buck or slugs. What an ordeal! Thanks again to the Benelli gunsmiths!