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About stevenb

  • Rank
    Senior Member
  • Birthday 03/13/1981

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  • Location
    Bullhead City, Arizona
  • Interests
    Firearms, knives, Corvettes
  • Occupation
    Homeland Security
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  1. I've read about several people having the issue where the bolt is sticking to the rear during cycling. I'm currently running into this same problem. However it has been an ongoing problem and I've had probably 5000 rounds thru the weapon. You can make it stick to the rear simply by pulling the bolt to the rear (not the bolt lock) Under close examination of the bolt carrier, I may have found the problem. Where the gas pistons impact against the bolt carrier, it appears that the metal has began to deform from the impacts. I then realized that this portion of the bolt carrier is the rail in
  2. Mitch, Really glad to see this project moving along. I think people will be real pleased with the hanguard/top rail interlock method. I would imagine the design to be copied in other rail systems in the future... Any new weight measurements for the assembly? Or significant changes to the forward barrel extension engagement? For reference, I'd weigh the OEM handguards and the top rail and fasteners. The real test will be the ergonomics of the handguard assembly and the weight of the unit. Steve
  3. Sure, I'm testing on my weapon a portion of the rail assembly. I'm using an extended top rail that is unsupported. This keeps the weight of the system down and uses the factory handguards. The unit also mounts the Mesa Tactical shell carrier. Far superior to any other carrier I've used. I trashed the Tacstar POS. Currently, I am still using the Side Armor barrel clamp picatinny mount for my sling and laser assembly. The quick detach sling mount is distributed by Sidearmor as well. The optic is a EOTech 552 holographic scope. The length of the rail allows me to properly moun
  4. Funny! Reminds me of that Surefire picture. I'm actually weighing a light mount option. Not exactly sure which way I am going to go with it yet though. I'd like a gladius, but due to the layout, I think a tapeswitch option is going to be mandatory. I'm thinking under my middle/ring finger on my off hand. The best thing about Mesa Tactical is they have the ONLY useable shell carrier. The Tacstar is a POS. It caused way too many problems. -Steve
  5. Hey guys. I modified another project I am working on (Mesa Tactical FCAM for the Benelli M4) to be something simpler for those without the need of a 4 point rail system. Plus, the rail uses the factory handguard. This item simply replaces the top factory rail on the Benelli M4. As you can see from the pictures, it offers a shell holder also. The extended rail is perfect for the EOTech, I actually cut it so it would be an ideal fit. You'll notice that the cuts on the bottom are pretty rough due to my limited tooling on hand. I did most of the work with a file. The rail is
  6. STA, Mine sounds exactly like yours. Very little fouling is present on the front of the gas plugs. I have never disassembled the plugs themselves. I'm not even sure if it is possible without some specialized tools. My carrier knocks back with light taps as well. Generally the weight of the carrier unlocks the bolt and allows it to travel rearward. Generally, this is how I invision how the plugs work in the ARGO system. The pressure charge enters the ports against the pistons themselves. You'll notice the relief cuts are on the pistons. My guess is this is to prevent any overpressure and
  7. 1. You need the 11707 model in order to simply drop the collapsible stock onto the weapon. With some gunsmithing, any of the older models can accept it. I couldn't tell you honestly what the case is legally. 2. The M4 (there are two models, the 11703 and the 11707) has 4 barrel ports as well as a removeable choke. I've been beating on my 11703 for about a year now and have had very little trouble. I'm pushing close to 5000 rounds through it of assorted ammo including high base 3" shoulder buster slugs. I believe the arguement that the 4 port design is inferior is off base. I believe that
  8. Aj, Thanks for the comments. With the newest revisions, the system will work with the 14" entry barrel quite nicely. I'd love to get one myself and make a SBS. All the shell holders are optional, so the user can decide what they can deal with. I'm extremely pleased with the weight of the assembly. Every time we turn around we find another way to lighten the unit without compromising the stability/strength of the system. We recently came up with some ideas for the actual rails that people will wonder why no one ever did it before. -Steve
  9. Red Cobra, Where'd you buy that HK in the other thread? Given the general pricing of other rail systems on the market for the M4, I feel this system will compete strongly considering what you get. No pricing has been finalized since we haven't finished the design yet. -Steve
  10. That same rail can be moved back to any of the mounting holes. Also, shorter lengths will be offered as well. I really think this is going to be the general design for the length. I'm leaning towards the weight savings over the support. -Steve
  11. Again, if anyone sees something they don't like, please explain your points. We're weighing any and all ideas. I agree that the top rail doesn't need to be any longer then the handguard. If someone can think of a device that needs to be mounted that far up, please indicate what. Given the iron sights on the Benelli, no extreme forward iron sights are needed. The only real reason the rail was extended so far out in the beginning was to simply support the side rails. In this current design with the short top rail, side rails can be mounted as such: The only concern then
  12. Here are some further pictures of the engagement of the rail system between the handguard assembly and the top rail. http://www.citlink.net/~boehm/prototype13b.jpg http://www.citlink.net/~boehm/prototype14b.jpg Here are some fully assembled shots: -Steve
  13. This project is still going strong. I recently took possession of a prototype top rail section. The designs are changing faster then we can keep up with as we refine the final design. First, the maker has decided to go public with this project. This will be a product developed and produced by Mesa Tactical. You can find more information about their products here: http://www.mesatactical.com/ Currently, this Benelli M4 project is called, "Floating Combat Accessory Mount, or FCAM system." Here is the prototype that I have in my hands (EOTech 552 mounted): http://www.citlink.n
  14. stevenb

    M4 Barrel Markings

    STA, Excellent job with the pictures and the legwork. I tried to photograph those ports before and couldn't do it. I feed my Benelli whatever I have and don't worry about it. If it breaks, Benelli gets to buy me a new one. I have 3000 rounds of 3 dram birdshot through it without any problem. Since then I've fed it many high power slugs. No wear can be seen on the carrier. I honestly believe that the gas piston I broke in under the first 50 rounds was a material flaw. Again, if it breaks, Benelli will buy me a new shotgun. Since their documentation with the weapon says noth
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