I don't know if this a known problem with the poly BE. I'd give them a call regardless.
If you still want to try a DIY fix, here's some info on Loctite from Wikipedia:
"Loctite's threadlocker products come in different strength grades, to suit the particular application.
Blue Removable No. 242, 243, 246, 248, 2432 & 2440 - Used for things you may want to unscrew with minimal hassle. It cures into a brittle, glassy bond that takes one good twist to break, but removes cleanly after that. Recommended for use with valve covers, water pumps and oil pan bolts.
Red High-Strength No. 271, 262, 266, 268, 272, 277 & 2760 - Used on things that you don't want to take apart for a long time. It requires heat from a torch or iron (to 250° C) to loosen its grip. It cures into a thicker, sticky bond that holds up better against vibration and shocks. Preferably to be used with automotive and mechanical operation such as nuts and bolts on Cars, Motorbikes, Ski-doo's and Boats.
Green - penetrating grade No. 220(blue), 290 & 294 - Used for use on parts that have already been assembled.
Purple - low strength grade No. 222MS & 222 - Used for set screws.
For Plastic threads - No. 425. - Used for small plastic threads."
Try the blue first.
If your pistol is working correctly when you are firing it, I wouldn't tend to worry about the occasional hiccup cycling by hand. I would check it for proper lubrication and any inordinate wear marks though.
Regards,
Greg