i_wish

Some are proof marks and the farthest one to your right is the date of manufacture. C'mon guys google is your friend. https://store.bluebookinc.com/Info/PDF/POWDER/MBPProofmarks.pdf http://www.shotgunworld.com/bbs/viewtopic.php?t=73492

Brownells has the older GSR's but here are the sights that are used now on the Benelli http://www.precisionsights.com/Product/BAR_product_page.html As far as a gunsmith goes try this guy http://www.kingarmory.com/ HTH

I've used this as a guide. YMMV. http://hkpro.com/forum/showthread.php?80819-Shortening-the-Benelli-Tactical-Stock-%96-a-la-Ned-Christiansen Goggle is your friend

I have one installed on my M1S90 and M4. Here are some links http://www.benelliusa.com/forum/showthread.php?t=23618&highlight=oversized+safety http://www.benelliusa.com/forum/showthread.php?t=21737 Remember "search" is your friend;)

On my 18.5" barrel, using my "el cheapo" set of calipers, I get: Dim #1=.630 Dim #2=1.120 HTH

I don't think they didn't pay the bill. Most likely they just let the domain name expire (they forgot when it expired when they registerd it) . Hopefully it wasn't grabbed up by someone else after it expired.

No problem. Just a thought, try calling HK customer service they may be able to help with import info? It's worth a try.

There should be some proof marks near the loading chamber on the receiver. This may help http://www.shotgunworld.com/bbs/viewtopic.php?t=73492

Looks good:D

I called Mesa Tactical and placed a pre-order on Friday for the plain jane version (90030). I was told what the published price was but it would be less than that. How much less they did not commit to but I was told it would ship out the fist week of November (if all goes well). HTH

You are correct. What works with one trial gun might not work with what everybody else has. I guess absolute co-witness is ideal but I would settle with a lower 1/3 or upper 1/3 if I had to or heck just being able to see the sights through the glass if the red dot failed. I'd be using an aimpoint comp m2 but hope to use it with my other red dots. Just being able to see the BUIS through the optic would be a plus. IDK more people will hopfully weigh in. Stranger Danger also has a good suggestion.

Would it be possible to create a shim that would raise the hieght of the Benelli M4 rear GRS to it's rail height? Could it match the countour of the receiver and original demensions of the current LPA sight? I would like to get "some" type of co-witness on my red dot sights. I have replaced the original rail with one of yours and I love it. I guess that an "extended" type rail that would screw into the existing GRS holes and then using a LPA picatinny rear sight would work but I would like to retain the existing GRS on the shotgun. What are your thoughts? What is the m4 community thoughts? I'll be the guinea pig.

My buddy has an HK marked Benelli M1S90 and his has the older style GRS. Mine isn't marked HK but has the LPA GRS on them. Are you trying to replace the complete GRS assembly? I don't know if there is a retro fit but there was a thread on another forum showing that the mounting holes don't line up. http://hkpro.com/forum/showthread.php?126041-HK-M1-Benelli-M1-Question You would have to tap newer holes to switch from the older GRS to the LPA GRS. I have read many horror stories of how the older GRS suck. They would fall off and also in your case, the screws shear off. Here is the websight for the LPA USA distributor: http://www.precisionsights.com/Product/BAR_product_page.html you can also get them from brownells but I believe they are out of stock. You can also find the replacement parts at Brownell's too. Good Luck and let us know how it goes.

Well I don't know if this will work while "on the move" but thisis what I do. Skip to the 2:36min mark. I believe it is an M4. I've practiced this method and it works pretty well standing still. You do lose the good round doing the change over but it works for me.