Discuss all accessories and upgrades available for the Remington 870 shotgun: stocks, forends, barrels, chokes, magazine extensions, followers, safeties, sights etc.
Hi, I'm Nadeka, a new member to this forum. I have invented a single point, no gunsmithing required, ambidextrous shotgun sling swivel stud. It is Patent pending, and is being manufactured and sold by GrovTec US Inc. for me. I feel that this will benefit tactical shotgun shooters by providing a solid single point attachment that is versital and strong. Testing has shown this product to exceed Mi-Spec pull testing, but does have one drawback. It will not work well with Side-Saddle shell holders, as the sling catches on the first shell / holder. Otherwise this could be what you have been looking for. It installs in one minute or less for most people. No special tools needed. and best of all, if you don't like it, you can replace the pin with the factory pin, in about a minute, and be back where you started.( The unit replaces the rear trigger plate pin.) We have both conventional stud head, and push button stud heads available. The part numbers are GTHM- 273 and GTHM-270. Check them out. We just started shipping them in March. If you have questions or comments about this product feel free to contact me.
Looks like an interesting idea. I do have a couple questions though (and please don't take them as put-downs; I'm an engineer, and genuinely interested in your product).
You mentioned that the attachments met mil-spec standards, but what does that mean, exactly? "Mil-spec" is a pretty general term. One US military shotgun specification I'm familiar with is MIL-S-3443G (though it's since been retired), which only describes a single test with a steady 220-lbf load. Did y'all test them for shock loads as well as sustained loads, and in multiple directions? Chicago bolts this size aren't usually known for being able to carry heavy loads.
The catalog states that a wrench is included for installation, but what drive type is it? Stock, the 870's trigger plate assembly can be removed with basic tools, or even just a stick if need be. Accessories always add complexity, but it'd be nice if this still let a user take down their gun with something like a Leatherman or .
Is there something under the swivel and screw heads to allow them to spin without damaging the gun's finish or backing out, or is it metal-on-metal contact?
Are versions for small-frame 870s in the works?
How about versions that replace the front trigger plate pin instead of the rear pin? These would be less likely to beat up a shooter's hand with some setups, but you'd probably need to use something other than Chicago fasteners.
Thank You for your interest. The Mil-Spec was a pull testing style test. GrovTec used their Mil-Force swivels, attached to my invention, and repeatedly broke the swivels. They then re-rigged the test machine to stress just the "pin", and they 'maxed out' the test machine. While I cannot immediately verify shock testing or directional pulling, I can say that since the 'pin' is manufactured as one solid piece of steel, it should be able to handle most pulling in any direction. On the Remington versions, the wrench is a small Allen wrench , used to tighten the screw on the opposing side (no torque needed, just to tighten it up). Yes, there are two nylon washers included, as well as some Loctite. We found that the Remington style could use inside threading for screws, but the Mossberg pins, would only hold up to 125 lbs., due to the screw head being so small. So, we opted to outside thread the Mossberg pins. If there is enough demand, we can easily market these for the smaller frame versions. (As it turns out, the small frame sized pin will also work on the Remington 742/7400 and 760/7600 rifles.) While the front pin could be done as well, we felt that using the larger rear pin, would give more strength. Actually a Leatherman tool would be all that is needed to install my invention. All we are really doing, is replacing the pin with a new pin that has an attachment point, and a srcew to keep it from pulling through. Simple but effective. (I was surprised that it had not been invented / patented before now.) We highly recommend installing the swivel head on the side opposite your trigger finger. This helps keep the sling from interfering with trigger manipulation. Please bear with me, as I am a gun shop owner, and retired firefighter. I'm not an engineer, just an individual who had a semi-smart idea. I hope this answered your questions. If not, feel free to ask me again.
Nadeka
I'm not sure if GrovTec is marketing them in the UK yet. You can already order them online from Midway USA. I think that GrovTec will market them primarily in the US, as this is where the lion's share of the shotguns are located. I do know that they are talking to both Mossberg & Remington about making them OEM parts and installing them on future production shotguns. Nadeka
Hi, I'm Nadeka, a new member to this forum. I have invented a single point, no gunsmithing required, ambidextrous shotgun sling swivel stud. It is Patent pending, and is being manufactured and sold by GrovTec US Inc. for me. I feel that this will benefit tactical shotgun shooters by providing a solid single point attachment that is versital and strong. Testing has shown this product to exceed Mi-Spec pull testing, but does have one drawback. It will not work well with Side-Saddle shell holders, as the sling catches on the first shell / holder. Otherwise this could be what you have been looking for. It installs in one minute or less for most people. No special tools needed. and best of all, if you don't like it, you can replace the pin with the factory pin, in about a minute, and be back where you started.( The unit replaces the rear trigger plate pin.) We have both conventional stud head, and push button stud heads available. The part numbers are GTHM- 273 and GTHM-270. Check them out. We just started shipping them in March. If you have questions or comments about this product feel free to contact me. 
