I've been looking at some options for 922r compliance and decided to order both the KZ and Surefire m80 forearms so I could check them out first hand. I don't have to twist my own arm very hard to spend $ on gun stuff so I figure I can see what works for me and sell what I don't like.
So some of the options I've been thinking about:
1-Don't worry about 922r, put my Carriercomp tube on if/when it arrives (probably o.k. option but you never know. Like Sukhoi fan said in a recent thread "It only takes one ***hole to ruin your life")
2-Leave my M4 like it is with the Sidearmor rail that I'm very happy with and just keep the stock tube/limiter
3-FL tube with Sidearmor rail and Surefire forearm used as just a grip with all accessories still mounted on the Sidearmor
4-FL tube with KZ rail forearm
Anyway, the Surefire is on backorder from Optics Planet (should be about 2 more weeks) and it's pros and cons have been covered fairly well in some previous threads but I received the KZ so I thought I'd share my thoughts on it since there isn't that much info in old threads. Sorry I'm not posting any pics but my camera is loaned out. I'll get some up later if anyone is interested.
All in all it's better than I thought it was going to be. The fit/machining and finish are good. It's not very heavy but very rigid. The rail nubs seem to be the same size/shape as the Sidearmor. Out of spec? yes, but definitely beefier than the stock Benelli rail. Installation was easy (some minor fooling around to get clearance for the ridge on the barrel where it meets the receiver.
The only real con is hand comfort. Although once I had it on the gun it was better than I had thought it was going to be from initially playing with it when I took it out of the box. I had been thinking it was going to be something like StrangerDanger's description of the M80 feeling like "holding a Pringles can." For some reason it feels better/less fat on the gun. With a rail cover on the 6 o'clock and ladder rail covers on the sides I'd rate the feel in the acceptable/not terrible range. I then tried a Tango Down vert grip on it and found that suprisingly comfortable and not an overly heavy setup.
Keep in mind I haven't put any rounds through this configuration so there could possibly be problems like those reported with the B&T forearm of gas system venting gas onto the support hand etc.
Anyway, I know this post is getting long. I just thought I'd share what I know so far about this option since some of us here are exploring U.S made options.
Take Care All,