JonLancewood

Looking for any spare light rings you may have for the AVA Mod 1 Benelli M4 light mount. Ideally looking for a 0.8" ring but would also be interested in any 1" rings for spares. Thanks,

Looks pretty neat and reminds me of the dual recoil assemblies on the HK USP. Adding this to the system won't effect the inertia of the bolt carrier but will change the spring force it sees during firing and hopefully the perceived recoil. My guess is that they're shooting for some type of progressive spring system that kicks in as the buffer nears the end of its travel? That tool has me more excited than the buffer ?

I'll also echo what others are saying re: the FFT trigger pack and polymer frames. I received my FFT kit from Todd from his last batch (May?) and had issues with the hammer dropping off the disconnector and onto the trigger. The groove in the polymer housing is too narrow and prevents the hammer from rotating freely. It's just enough static friction that when the weapon is charged, the hammer stays stuck on the disconnector. Mine was right on the edge that if I tapped or pressed the hammer, it would pop free and down onto the trigger. I spoke to Todd about this and he was helpful overall. His thoughts were that the polymer housing have inconsistent tolerances and that sometimes his hammers won't work. Kinda of disappointing but having worked in molding shops, I would have to agree with him. He did offer me a full refund and was helpful through my conversation with him so full marks for CS. He recommended the A&S unit but I opted to purchase another OEM housing and roll the dice. As luck would have it, I received an older aluminum housing and the hammer has adequate clearance. I need to re-assembly the trigger pack to make sure everything works but so far it's looking promising. For anyone interested in this route, I got my trigger housing from Midwest Gun Works. No idea if I got lucky or if they're sitting on a pile of the aluminum units.

Thanks for the reply and link. I used his guide for installing a FFT trigger pack and it's how I arrived at this question. While assembling the bushing and snap ring, I'm wondering what's going on with the groove and ring interface. I measured both with a pair of calipers and found the two grooves to be 0.0290" and the snap ring to be 0.0390". Physically, the snap ring cannot seat into the grooves on the bushing. Is this normal? If so, how do these two grooves manage to keep the ring in place?

Sorry if this is obvious and readily covered but when reassembling an M4, should the snap ring clearly slip into the two side grooves in the hammer bushing? With both parts out of the trigger housing, the snap ring does not slip into these grooves for my shotgun. Is this normal or did I damaged something here? It's not even close on my parts. I don't think I damaged anything but the fact that there seems to be no positive interface between the snap ring and bushing has me wondering. Thanks!