I won't touch any epoxied on handguard. Last year bought an upper from a reputable manufacturer you would all recognize not realizing the Midwest Industries handguard used was epoxied on. Call me ignorant I was unaware people would trust such a crazy concept. The intended use was a scout rifle design, so I actually USED the provided rails on the handguard to mount the scope forward...imagine actually USING provided rail surface.
At first it was good, then I started having accuracy issues. At about round 80 my buddy was shooting it and the scoped handguard came off in his hand.
This was a 458 SOCOM, in retrospect it's crazy said manufacturer provides built uppers using such a handguard in this chambering but they do. I'll credit them that they made it right in that I sent them back the handguard and barrel nut and they discounted the price. I re-installed the barrel with a properly designed ALG with the handguard screwed to the barrel nut and all is good.
