AR9
I hope this is the right forum. I have been playing with some PSA AR9's. I bought a 2 complete uppers. One 16, and the other 10.5. I bought 1 complete 9mm Glock mag compatible lower. It runs well. I bought one of their stripped billet LRBHO lowers. Built it for the 10.5 upper. Shockwave brace and tube. Mistakes on building the lower? I dropped in a standard 3.0 buffer. It worked fine but I think the BCG was moving too fast for the LRBHO mechanism to work. I switched the buffer to a Spikes ST-T3 5.4oz buffer. It seems to have pretty much fixed the BHO problem. The BHO is also dependent on the mag spring tension.
I bought 2 Matrix Arms lowers to build. They have an allegedly better LRBHO design. One may replace the PSA LRBHO lower. I am waiting for a PSA .40S&W upper to come out.Or I will find components to build my own.
One thing that seems to be the common denominator with Glock mag compatible carbines is the lack of a feed ramp. I was at a club match in Key Largo the other day and stopped by and talked with a guy who seemed to not know anything about his Wilson Combat carbine. He opened the bolt and I looked. No feed ramp in the lower, and nothing going machined into the barrel. I have been known to port cylinder heads so I have the tools to make my own feed ramp. From what I have seen these guns can be ammo picky. Especially with JHP's. So far they feed Federal aluminum, and brass 115, MEN 124gr NATO. They don't like Winchester steel. With JHP's Geco 115gr, 115gr Freedom XTP's. I can't remember if I have used the Remington bulk pack 115 JHP's or not.
I do have some 9oz buffers to try in the future if I could remember to take them to the range!
I am not a stranger to the PCC's. I have a Keltek Gen2 9mm Sub2000, and Hi-Points in 3 flavors. 9, 40, and 45. Yes I am thinking about getting a 10mm one of these days
Originally Posted by NQNPIII
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