2017年4月30日 · The ar57 is a long, top-heavy, slow handling design with much less f/lb than 223 The 5.7 is a great round for the ps90 No real point in an AR15 other then less noise

2011年9月22日 · As for the ATI AR57 upper – I can’t find a lot of info other that some early testing done by a few folks and that it appeared at an NRA show back in 2007. I too was concerned …

2010年4月25日 · The AR57 buffer is made for a CAR style tube, not an A2 style tube. I do have a strange problem when using my AR57 upper on one of my lowers. That lower has a …

2023年7月29日 · This AR57 Upper Receiver Assembly converts any AR-15 lower to a rifle capable of shooting 5.7x28 ammunition. The unique upper design loads from the top and …

2011年6月3日 · For those of you that have no idea what I am talking about, the AR57 upper is a monolithic railed upper that fires the 5.7mm round and uses P90 magazines (50-round). It's a …

2022年7月11日 · Fit/finish comparable to the original AR57 production. Bolt profile is different, so swapping bolts between original and panzer uppers is a no go (here’s looking at you Ar57 FA …

2010年3月18日 · I just bought an AR57 upper which came with a carbine buffer. I'd like to use an A2 stock, can I use either a standard A2 buffer or the special carbine buffer that came with the …

2024年1月13日 · UPDATE.. i tried the CMMG mags on a couple of my other ARs and the mags locked in perfectly on all of them but then I tried my other AR mags on the AR57 and they did …

2012年12月11日 · AR57 designed by Rhineland Arms and produced (manufactured) by AeroPrecision. They must have made a ton of these lower receivers for thier AR57 uppers....

2010年4月25日 · I am planning on buying a AR57 upper and building one of those soon. The PS90 is a wonderful platform and excels in what is was designed for "being a personal …