Apr 30, 2017 · Is it still around, I found a webpage for it, but it doesnt seem to have the PDW length upper available anymore, I also heard that the company might be going under, is this true? Anyway, …

Nov 14, 2022 · AR57 16" Complete ULT M-LOK Upper, AR57 Mfg, Factory new. Comes with a 16" lightweight barrel with M-LOK rails. This AR57 Upper Receiver Assembly converts any AR-15 lower …

Jul 11, 2022 · My observations: 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 …

Jan 6, 2026 · The big difference from an FRT such as "super safety" is that an auto sear adds an essential OOB interlock, which AR57 lacks. And, to make matters worse, an OOB on AR57 tends to …

Jul 29, 2023 · AR57 12" Complete ULT M-LOK Upper, AR57 Mfg, Factory new. Comes with a 12" lightweight barrel with M-LOK rails. This AR57 Upper Receiver Assembly converts any AR-15 lower …

Apr 25, 2010 · I have the carbine AR57 buffer with my 6 point adj stock. I got the right buffer and buffer tube and all. I know I have the standard RRA trigger with hammer and spring. According to …

Oct 14, 2024 · I had an AR57 upper and it used a special extra heavy buffer with a standard carbine buffer spring. I would not try to shoot a 5.7 upper with any buffer lighter than what it is designed for.

Apr 26, 2014 · It seems that many AR15.com members bought AR57 BFI lowers that are way off specs. I read about each problem and then proceeded to start measuring mine and installing mil-spec parts.

11/14/2024 10:10:51 AM EST [#11] Quote History Quoted: I don't know much about the Panzer Arms AR57 upper but it sure looks similar to the old AR57 uppers. The old AR57 uppers came with their …

Mar 15, 2009 · 2) Howcome my AR57 Upper assembly will not run full auto ? A) All AR57 Upper Assemblies come standard with a semi auto bolt. 3) Will the AR57 Upper receiver work with my …