Armory Sponsor
Posted: 12/6/2008 12:49:56 AM EDT
|
Hi guys,
I've had my Benelli M4 since 2004. I've put about 5000 - 7500 rounds through it. Earlier this year I had the weapon serviced by Benelli USA and they replaced the barrel with the 2 port version. They also replaced the entire BCG assembly due to deformation where the pistons strike. Handguards and pistons were also replaced. I've had an ongoing problem with the weapon though. During high speed rapid firing of the weapon, I can induce a problem where the hammer drops, and the weapon doesn't fire. The hammer is against the bolt, and a live round is in the chamber. This only happens during extremely fast shooting. Like 5 to 7 rounds per second (no kidding.) It seems to be that the trigger is allowing the hammer to drop while the bolt is still in cycle. Has anyone else experienced this? Or am I stuck sending yet more of this weapon to Benelli to have it repaired? Thanks Edit: I just got the Benelli out. If I pull the trigger and drop the hammer, then cycle the bolt to the rear, then begin to let it return to battery, as soon as the elevator drops, I can pull the trigger again and drop the hammer against the bolt while it is still in motion. Any of you with an M4, can you try this? See if it happens on yours. Do all M4's operate like this? If so, this is some mickey mouse bullshit. I have to consciously slow myself down for repeat shots in order to avoid this failure. |
|
Quoted:
Edit: I just got the Benelli out. If I pull the trigger and drop the hammer, then cycle the bolt to the rear, then begin to let it return to battery, as soon as the elevator drops, I can pull the trigger again and drop the hammer against the bolt while it is still in motion. Any of you with an M4, can you try this? See if it happens on yours. Do all M4's operate like this? If so, this is some mickey mouse bullshit. I have to consciously slow myself down for repeat shots in order to avoid this failure. I tried this with mine while sitting here at my desk and riding the bolt forward, and I can also get the hammer to drop shortly after the elevator drops and prior to the bolt being fully forward. During normal rapid shooting, I have never had a problem. Perhaps you have a fast finger, or a weak spring in your shotgun that could be replaced with a stronger one that would force the bolt forward faster. |
|
Yes I have noticed this too.
Its an artifact of the disconnector design and how it holds the hammer when the bolt is closing. If you let go of the trigger after the hammer drops, the hammer will reset onto the trigger, then if you pull the trigger again the hammer can drop when the bolt is almost closed. ETA Have never had any problems with this whilst actually SHOOTING tho. I never shoot that fast, and since magazine tube dumps are only fun once in a while, its not exactly a problem for me 
|
|
Wow, that's amazing that a quality weapon would have such a flaw. There is no way to modify the disconnector so it disconnects until the weapon is fully in battery?
The Benelli manages recoil very well. I find it very easy to double tap a target during the same recoil impulse. I put the first blast low in the chest, and the second usually spanks them in the upper chest. The trigger on a M4 is pretty good, so the reset is fairly short and allows you to double very easily. My only solution is to maybe get a lighter charging handle to increase bolt cycle times. Then perhaps look for a better main spring action. Surecycle maybe? Then perhaps run hotter loads to cycle the action faster? |
|
I've never noticed it as a problem before, or as much as a problem as you seem to be having with it.
The disconnector style is very similar to the AR15 style of disconnector. (at least operational-wise) If I were you, before I did anything else, i'd field strip the shotgun and take out the trigger group (follow the field strip guide that it should come with in the instructions). Check out the disconnector and the trigger, and see if there is anything that looks wrong with it. The only time I even ever noticed that it could do this, was when i was playing with the trigger group and seeing how the whole shebang worked for the first time. |
Sorry to dig up an old thread but this is an issue that, from what I've seen, ALL Benelli's share. When I'm not shooting a rifle or a pistol, I'm in a duck blind (no Fudd jokes, dammit  ), and this is a fairly well-known issue for hunters. What's happening is that the hammer is being released before the bolt is fully into battery but is being caught by one of the safeties (it's late, can't think of the more technical explanation) to prevent it from firing. An easy way to replicate this on the range is to load a live shell and then bump the bolt slightly (1/8"-1/4" or so) out of battery and then (with the weapon pointed downrange) pull the trigger. The hammer should drop without igniting the shell. I've seen this happen in a blind ~6 times over the last 8 years or so, and it's always been due to the bolt being slightly out of battery.
Most likely, the same thing is happening when you're firing quickly - the hammer is being released just before full bolt lockup and is striking the firing pin before the bolt is in battery. |
| this happened a couple of times to me today but only when I was using the cheap win wal mart stuff. when I switched to some of the other stuff that I had, it ran flawlessly. This was the first time that mine has been shot so I think that with a little break in period and maybe 100 rounds of solid stuff that it will fix what is probably not a problem. |
Armory Sponsor