I will be getting 50 Spike's Carbine Buffer Tube Assembly kits hopefully within the month. My regular price is $61.50 with free shipping, but with the forum discount, it ends up being $58.43. Until those arrive, The LMT Receiver Extension paired with either LMT buffer and spring, or VLTOR buffer kit, is all I have left. If you have never heard of either company, LMT has been a long time military contractor and when it comes to mil-spec, they are up there with Colt. VLTOR makes one of the strongest forged upper receivers, the MUR. They also make the popular monolithic VIS upper receiver. In addition, they have worked with BCM to develop the BCM GUNFIGHTER Charging Handle, as well as Noveske, to develop the KEYMOD system, which is used in the new Noveske NSR Rails and the soon to be released VLTOR VIS Monolithic KEYMOD system. Spike's is a great company and I sell a lot of their stuff, but know that there are available quality options. The Spike's ST-T2 buffer is a heavy buffer, which most uppers may not need. Spike's uppers tend to be over-gassed, so the ST-T2 helps to keep their uppers reliable. This is why when you buy a Spike's upper, it comes with an ST-T2 buffer.
