Lasermax guide rod laser for glock 20 lms-1151g jams the action - LaserMax Guide Rod Red Laser Sight for Glock 20/21/41

I purchased the laser sight for my stock gen 2 mod 20 10 mm Glock since it doesn't have accessory mounting features. I like the concept but reality was not good. The cap of this isn't held onto the laser tube other than friction fit of an oring. Installation was simple other than using my own tools instead of the provided "tool" to remove old and install new slide lock
spring. Out of the box the cap came off from the tube with manual cycling of the slide. I removed and checked installation per instructions and videos a couple of times but the cap kept separating from the tube with manual cycling. It took forever to contact a live person at Lasermax customer service but finally they agreed to send a new cap. New cap made it through the manual cycling test so took it to the range. On the 12 round, the slide didn't return to full lockup. Was barely able to get the gun disassembled and sure enough the new cap had separated from the laser tube causing the slide to jam again. The jamming of the gun makes this totally unusable and a waste of money. I'm baffled as to why this guide rod laser doesn't have a method of positively securing the cap to the tube like some of the other Lasermax models....especially with the power of the 10mm round. I'm trying to get ahold of Lasermax again (wish me luck with that) to see if they will send a brand new complete assembly. I'll update when/if that happens.
Of course it's past the 30 day return policy for getting my money back from Optics Planet which is another. Those of us that work can't just get out to the range whenever we want. I used up the 30 days trying to contact Lasermax for resolution of the problem.
I wouldn't recommend this guide rod laser for the Glock 10 mm platforms due to the cap separation problem, using it makes the gun totally unreliable.