StrangerDanger

Thanks for the great quality pictures. That's where I had the spring set. Ran the weapon today without a single problem.

The OEM hammer has about 13,000 rounds on it. Other than minor finish wear, it is in great shape. I took the M4 out again today. Put another 200 rounds through it. Couldn't get it to fail a single time. I tried removing the slide glide lubricant from the receiver rails. I had a theory about the viscosity slowing the carrier down and maybe not cycling the BCG all the way to the rear enough to cock the hammer. The weapon ran perfect like it is supposed to today. I haven't taken it apart yet to see if there is any more wear on the FFT hammer. I hate uncertain issues.

I'm not sure. I've tried for an hour to get the hammer to fall by manually cycling the weapon. Every time it locks up solid. I even bounced the shotgun off the cement on the rubber butt pad to 'shock' the weapon. Nothing. I didn't end up going out today, perhaps tomorrow. I'm thinking of pulling a trigger pack out of my other M4 and see if the failure occurs with it. Perhaps try to localize where the failure point is.

Thanks for the info and pictures. I tried finding some on the internet, but none could be found. I reset the spring to the factory position on all three units. I'm kind of at a loss to what is causing the sporadic failures.

I put about 200 rounds through mine today. 100 high brass #4 birdshot, and 100 low brass #8. My hammer has a nick in it as well, but it isn't as pronounced as the one posted above. It appears to be where the hammer strikes the edge of the firing pin. I have plans to go out again later today and run a few hundred more through it. I got winged pretty good by some blow back today. I had my glasses on, but some of the shot or maybe some dirt blew back and bounced off my cheek and into my left eye. It went right under my glasses that have a pretty good amount of coverage. I experienced several hammer down conditions, and I wasn't even shooting fast. Both on the high and low brass loads. I found a potential problem with the shell stop. The spring was in the wrong place compared to every other M4 I've handled and worked on. So I shifted it, and we'll see what happens later. I started a thread on that issue. The trigger itself feels great. The break is much more crisp.

My only issue with the BLAM is the way the unit shifts due to only having a single screw through it. The two two black plastic bumps on the MOE rail aren't large enough to limit the unit from rotating. You can't tighten the screw enough without risking stripping the screw or cracking the plastic MOE rail segment. I'm thinking of filling the two black plastic index 'plugs' with epoxy to try to limit movement. The unit itself will rock back and forth maybe 5 - 10 degrees. It's enough to annoy you though. I need a rail segment with at least one more picatinny rail 'bump.' There currently isn't enough room to mount my light and sling to the short supplied section.

Hi all, I'm curious where all of your shell stop springs are installed. Before you go, "Huh?" It is part #74. I have access to three M4's, and I just noticed that the spring has been installed in two separate locations. On each unit, I simply replaced the spring to the location that I received the weapon from the factory when installing GG&G releases. The GG&G shell stop is simply an OEM unit that is tapped for the use of their oversized release. So no physical changes are noted. On all three samples, the units appear the same, so I do not believe there has been an inline production change from Benelli. On my oldest M4, an 11703 which is from '04 which has been fully rebuilt by Benelli in '09, the spring has been all the way to the rear of the shell release lever in the little pocket at the end. Wear on the receiver corresponded to the springs location, so I can tell that it hasn't shifted since I initially received the weapon. After 13,000 rounds, the spring has burnished itself into the anodizing. I noticed on my two newer 11707 from around '09 and '10 production, the springs are located in the center of the shell stop just behind the retention pin. My 11703 has always been a real PITA to eject shells from manually be depressing the shell stop from the inside of the receiver. Particularly the very last round in the magazine tube. So tonight, I decided to disassemble the shell stop, and move the spring to the central position of the shell stop to see if the level would operate better. The rounds are significantly easier to remove now manually. I'm going to live fire it again later today to make sure everything is functioning properly. There is really no seat position for this spring, so there is a lot of variables where it can be placed. If you're not careful when cleaning, you could easily knock the spring out of alignment and be forced to disassemble the unit to fix it (not fun even with the correct tools.)

I don't know anything about the M3, I fondled one at the gun store ten years ago and couldn't figure out how to switch from semi to pump. However, see if this schematic helps out any: Talk about a complicated setup.

I think the issue is if you use the icon bar above to add pictures. I type in the [ img ] [ / img ] tag manually and just copy and paste the URL in. If I click to add a picture, and it displays the picture here in the text box, it gets sent to moderator heck and never gets posted. I host my pictures on photobucket rather than using the annoying hosting service here. The pictures are too small and drive me insane when I'm viewing the site from my eyephone.

I don't know anything about the M3. See if this diagram helps though: /img]

Good review. Do the scuffs on the hammer appear to be deeper than the nickel finish? Any noticable trigger pull difference with the carriercomp hammer installed? I plan to go out tomorrow with mine (weather permitting) with a few hundred rounds. If the surface is deforming from inpacts from the bolt carrier, that sounds like a heat treating issue.

Looks like a converted M3.

15 months? Damn. You have a nice assortment of top shelf parts for it. They have some 14" M4 barrels on gunbroker right now for like 800 bucks. Pretty sure they're HK's.

I used Brian Enos' Slide Glide for my sear points. I think I ate up about 45 minutes with my 3 year-old daughter assisting. She assists with cleanings.

Last month, I picked up a BLAM4 mount to mount the light and sling to. The primary goal was to cut weight and get the sweet ergonomics of the factory handguards. I probably cut 4 or 5 ounces of weight in the move. The BLAM4 isn't perfect by any means, but it gets the job done. The light is positioned in a good location for thumb activation. Dumping the Surefire M80 also meant I lost a 922® compliance part, which spurred me to jump on these FFT trigger group parts. I would not pay the extreme prices for the collapsible stocks at the moment. There is a chance that Benelli will begin selling them directly to the public since they're going to be selling M4's with a functional collapsible stock in the very near future. Back in the old days, Benelli sold the stocks for about 160 dollars new. Given the Obamanomics of late and the devaluation of the dollar as a result; we'd probably be looking at a sale price of around 190 - 200.

Thanks. Glad to help. The camera I used is a mid ranged camera. It's a **** Cybershot DSC-H10. The macro setting works pretty well on it. Natural ambient light always helps.

Wrinkles, Does your action feel any different now that you dropped the new parts in?

Thanks. Either way, if you have a high amount of rounds on the weapon, I highly recommend pulling the hammer plunger and spring. It's pretty easy to get out and it feels much better after it was cleaned and lubricated. A thick lubricant grease is needed to really get the benefits here. The action cycles much more smoothly since the hammer gets pressed downward as the BCG retracts to the rear each time. Doing this tear down earlier gave me quite a bit of perspective about how the trigger group works. Before, I just assumed it was magic.

Looks good. Did you do the photo work, or just provide the props? Always thought a concert would be great if they had empty casings all over the floor. Even if they were just trash hulls and steel/aluminum case crap. Then someone would trip, and the lawyers would fast-rope out of the sky into the scene.

A couple overall shots. Weighed in at 10 pounds loaded.