Dankbiz

Comparing it to the oem plates, the difference in lengths at the bottom slips was just about that 1-2mm visible gap that i ended up shaving down. I also had to deepen the canal of the FAB handguard's custom lower lip where it sits on the handguard slot on the receiver. Fitting one guard plate at a time onto the frame, they would eventually both allow the barrel to meet with the receiver successfully. However putting both plates together and trying to close that gap was still a problem. So finally, i discovered the inner walls of the FAB guard also needed some sanding down as they were holding on to the barrel's seat ring, not allowing for it to push onto the wall of the receiver.

Took some fine detailing but we got it flush. Thanks for the insight dude!

True! I haven't had a chance to take it out to a range yet with this setup and admittedly it's a poor configuration for resting my cheek against the stock. I had a micro red dot before this strikefire but thought it'd be fun to have a configuration that allowed for the use of a magnifier. Again I'm aware it's not exactly conventional nor necessary for a shotgun, but I thought it'd be fun to try for long-ish range target shooting with slugs

Sad to know, but lesson learned

Understood. Really appreciate this insight, definitely gonna try shaving it down further. Would suck if it ends up being unusable, but it wasn't too expensive of an investment

Hey guys, was wondering if anyone could let me know if this is a potential safety hazard or not. I ordered a new quad rail polymer handguard from FAB Defence for my M4 which, for a "custom" design specifically for the benelli M4, did not fit right out of the box. After several hours of sanding down a few areas I managed to get the guard to fit nice and snug and have it snap on with ease. The magazine tube cap finishes the job at fitting the guard as well as it can fit, and the guard itself comes with 5 screws which I screw in at the end. The potential problem I see now is that the bottom lip is meeting with the M4's handguard cup/slot before the rest of the handguard itself can be flush with the receiver. This results in a gap of around 1mm, preventing the barrel from going "all the way" into the action. It sits over the bolt carrier well and does not prevent the bolt from doing it's job. Switching back to the original handguard I see virtually no difference in functionality, but that 1mm gap is properly closed. Considering this area is where the shot shell goes *boom*, am I or the M4 in any danger with a compromised fitting?

Update: Removed the bolt carrier for a better look, im noticing this "chipping" pattern on both sides. Is this typical of benelli bolt carriers due to pin staking or is mine faulty?

Hey guys, I'm a first time firearm owner and I've had an M4 for less than a year, and have only put about 100+ rounds through it. I noticed chipping on one of the pinholes in the bolt carrier. Should I be worried?? I'm from Canada so I'm not sure who to contact about this or if it's even a huge deal, but I'd assume it is a cause for concern. I've been firing 1oz 2¾" low recoil slugs and heavy load 1⅛oz 7½ target shot.