StrangerDanger

I'd like Kip to do this, and incorporate it into a bomb proof top rail. Here's how: Remove the factory rail. Then remove the rear sight base. Use the three (3) mounting points from the rear sight to attach the new rail section to the receiver along with the existing five (5) screws that hold the stock top rail in place. The rear section of the replacement rail would have to be machined to accept the stock rear sight base. New mounting hardware would have to be supplied to make up the difference in thickness that would be added to the sandwiched rail section. The raise in height would be kept to a minimum. The target goal would be high enough to establish a sight plain over the top of the solid true spec picatinny rail. The rear sight mounting points are much sturdier than the existing rails are. Note the thickness of the receiver. Note that the screws are threaded into the steel rear sight base from the inside. This alone is a big improvement over the five (5) small screws that are threaded into a thin aluminum receiver. The front sight would also have to be replaced along with a slightly taller front sight shroud to make up for the height increase in the rear sight. The best of both worlds would be a set of sights that are a combo of fiber optic and tritium with high visibility white rings surrounding the lamps for daytime use.

The off color made it harder to see. The black colors are parts Brownells doesn't stock. Overall, this issue is addressing three separate issues; 1. Nominal weight reduction 2. Reliability enhancement 3. Increased cyclic rate/lock time Titanium might not even be needed honestly. An aluminum tube with a steel insert where the buffer reciprocates in it would work. Cheaper and would weigh less. It's debatable on if the reduction in weight would be a good thing or not. Given the location of the receiver extension. It might make the weapon have the perception of being front heavy, even though it would be overall lighter. The linkage inside the receiver extension is pretty unique. All the torsional forces are mitigated at the plunger. If you look at the end of your bolt carrier's tail, you'll notice that it is rounded there. The plunger itself shows little to no wear (this is after 12,500 rounds of use on mine). The tail of the BCG doesn't rub along the edge. The plunger centers the linkage as it reciprocates. The recoil extension spring tends to act like a live center for the plunger as well. Inside the stock receiver extension, the finish is sub-par IMO. It's fairly rough when it should be a polished, coated/hardened surface. The aluminum would be naturally lighter than the Titanium. Aluminum holds up well on the M16 receiver extension quite well. I'd like to see more scientific data on the relation between reduction of weight in the BCG and the receiver extension and how it increases cyclic time or reliability. Or, if it is battering the the BCG without a spring weight change. If it is determined that a lighter weight BCG package will increase cyclic rate, I'm sure a lighter weight plunger could be fabricated. Since we're talking about a 12 gram difference causing cyclic problems in a series of weapons with the GG&G handles. From multiple sources, we've seen that minor changes in bolt carrier group weight has had negative side effects on multiple weapons. Such as the use of the GG&G bolt handle. The stock handle weighs in at 12 grams. The GG&G unit weighed 24.5 grams IRC. Since there are also many accounts of people not having any issues at all, I suspect that; 1. Subjects with negative effects have worn recoil springs. 2. Subjects with negative effects may be recoil sensitive. Purposely allowing the shotgun to move rearward causes the action to move sluggishly in my tests. This failure may also be tied to item #1. 3. Varying degrees of the weapon being broken in. I believe this has to do with the sub-par surface finishing inside the recoil spring extension. 4. Poor lubrication or climatic conditions. 5. Poor cleaning habits. The majority of the M4's have never had their recoil spring tube disassembled. As the BCG reciprocates, it transfers debris into the extension. This is a difficult assembly to properly clean without disassembling every 2,500 rounds or so. When I disassembled mine after 11,000 rounds, I emptied a quarter of a can of BreakFree down it to clean out all the collected oil and debris. Naturally, these are unscientific tests, since there are many variables. Shooter, ammunition, location, release lot of weapons, lubricant/cleaning regiments. I'm aware that most do not push these weapons to these limits. However, that never stops people from doing the modifications. Also, other benefits of such a project would easy to see. Enhanced reliability with lower dram loads would be the number one factor. The superior surface finish would leave users with a smoother operating weapon.

I'd break it up, and sell the shotgun in stock form. Sell the other parts on gunbroker individually. You'll get the most out of it. Combo deals rarely result in getting more.

Kip, awesome news. This is exactly what I wanted to hear. I had hoped these parts would be more than just US made parts. I definitely plan on buying these parts. Another portion of the weapon to inspect is the recoil spring. If the spring is weak, the cyclic rate of the weapon will be significantly reduced. I never noticed how weak my main spring was. In fact, neither did Benelli. When I had my M4 serviced by Benelli, it had approximately 10,000 round on it at the time. When I procured a second M4, I was surprised to feel how much firmer the spring was when retracting the bolt handle. I've been considering getting a new receiver extension so I could send the tube off to Robar to have the interior coated in NP3 Plus. Plus the Recoil Spring Plunger. I figure it might help with the cyclic rate. Kip, we want a Titanium part #120. It might be a good idea that some of these springs being replaced at the time that the disconnector and hammer are replaced.

I wish Kip would make a replacement receiver extension out of Titanium. That would probably save a significant amount of weight, and offer those of us trapped with the m1014 and 11703 models the ability to upgrade to the 11707+ collapsible stock variants.

Same size as his. Should be 4 + 1. Essentially, if you take off the limiter tube that the M4 comes with, that is how long the barrel would be. The cap would screw right onto that shorty tube. Hence carriercomp's awesome titanium replacement. The goal is to save probably 3.5 ounces or so over the existing metal tube. cameltoe, never used their comp. I can't recall seeing much muzzle flash off the Benelli at night. It might be there, but I don't recall a blinding light.

Who makes the best full length US mag tube for a Benelli M4? carriercomp. Superior machining, fit and finish. How about US followers? carriercomp's offering will be the better of the options. The Brownells unit isn't marked USA made. carriercomp's is cheaper too. Side saddles? Sidearmor. Be it their full rail system or their shell carrier/top rail combo. The ball bearing detent design that retains the shells is better than the tacstar and mesa unit I've used. The Tacstar is absolute garbage. Sling attachments? Slings? I like the Vickers VCAS padded sling. The Benelli M4 is quite heavy, so padding is a good thing on lengthy hikes. Charging handles? carriercomp's, FFT's 1/2" offering and Design Concepts are the only ones I'd consider. Otherwise, I'd stick with stock. They're the only ones that are the same or less weight than the stock unit. Given that Design Concepts are pretty rare these days, I'd wait it out for carriercomp's. Bolt release buttons? GG&G for sure. No plastic parts. Some offerings are okay if you can drill and tap your existing unit, but that is beyond the means of 95% of us. Taking it to the gunsmith will add another 50 bucks on top of your purchase price, so you might as well just get the GG&G.

Anyone ask if they're doing any other color than black? The price is quite good. I had expected 75 - 90.

Nice. Saw this at arfcom. This was an 18.5" shortened to 14" by King Armory. http://www.kingarmory.com No idea what he charges. If you find out, please post it. I'm told it isn't cheap, but cheaper than buying a barrel.

Glad to see these coming. Kip, is there any way to address the trigger disconnect issue with the m4? When outshooting the shotgun, you can drop the hammer on the bolt carrier while it is still cycling once the shell elevator drops. You end up with a live round, hammer down condition. My bandaid fix was to reduce the weight of the bcg by going to a lightweight charging handle and shooting hotter rounds. Aside from being US made, would you consider your offering to be a superior part? Ie: better materials, machining, heat treatment and/or finish? Also, have you started working on a disassembly guide of the trigger pack? Are you going to SHOT this year, and do you have a booth? Thx Stev

Generally, I buy trijicon's over other brands. The Meprolights are good on the Benelli. Not great though. They lack the white ring around the lamps that aids in daytime visibility. The rear set is small on purpose. You cannot align the 3 dots like on a handgun because your face sits too close to the rear. They just blur out as you focus on the front sight or the target. Their value is to give you a visual reference as to where the ghost ring is so you can quickly index your head to the shotguns sights. You wouldn't want larger or a brighter rear IMO. The rear is easy to replace. All you need is a flathead screw driver. The front will require an open ended 5.5mm wrench. It is recommended that you replace the front sight nut, but not required. The nylock ring is only good for one use. So use blue locktite if you opt to reuse it. You'll be happy with the Meprolights I think. Stev

A typical shell weighs 2 ounces. So 28 ounces plus 20 ounces of rail = 48 ounces of fail. 4 pounds. No want.

Yes. Mine has left contact marks. Look along the front edge. About 9,000 rounds on it when this picture was taken. Some alumablack would cover it if I cared.

Lot bigger than I realized. Looks heavy too? Maybe 6 - 8 ounces?

Maybe you needed Tex' Tactical Corncob Holder© to do the job proper.

Try more lube. The M4 likes to run wet. Not dripping, but heavily coated. Try a box of high brass bird shot to see if the same failure occurs. Many say the M4 needs a good breaking in when brand new. So some high brass might do the trick.

Drop that Dremel! Contact Benelli Customer Service.

Look to see where the spring is before you disassemble the unit. Note the depth of the roll pin. If it isn't seated fully, it will interfere with the bolt carrier. Kb fab covered the tool requirements. It's easy with the right tools.

I'd be more worried about a trigger pack failure or bolt breakage. Most of these dedicated piston op uppers remove parts from the weapon. Example. No gas key to shake loose. As with all weapons, you should start to assemble a replacement parts kit. Pins, detents, springs, proprietary parts, bolt carrier group, trigger pack. Throw in a few basic tools, oil and patches. Maybe a boresnake. If you're fighting the hoards of cannibals to the level that you're wearing out guns, you might want to go another direction. The failzero is a great choice though. I'd like to have it done to my MRP. I may have to do nP3 + instead though. I have a out a 1000 rounds on the MRP since last cleaning it. Without fouling being blown into the upper, it stays lubricated. The bolt is still oiled. It would have been burned off or carbonized by now in a gas op sys. Still accurate too. I was hitting a real estate sign at 450 yards off hand in the wind yesterday with green tip SS109. Guess you didn't get killed? You do the smart thing and hide it?

The Meprolights are nice. The rear set are very small lamps. Most think this is a bad thing, but they are designed to be small on purpose. Their intent isn't for you to align the 3 dots. It is to offer you a visual frame of reference to where the rear sights are. If you buy some, get a 5.5mm wrench ahead of time to get the front sight apart. Many would opt that you replace the retaining nut rather than reuse it. It can be found at Brownells.

Better hide them pine cones!

Where is the guy who claims, "Caedite eos. Novit enim Dominus qui sunt eius" when it comes to using no weapon light period? Or how bad guys fire at light sources. The one that has never used simunitions or even impromptu airsoft for force on force training. Activation control and momentary control function are the keys to using a white light to your advantage.

This is the answer.

Which optic are you considering?

If anyone has time, would they pull the rubber pistol grip off and take a picture of the stock? Is the pistol grip hollow like the factory unit? Thx!