Originally Posted by
Magic_Salad0892
When it comes to ''better'' than the TDP I don't think of gas systems specifically.
Bushmaster makes a midlength: that doesn't mean they exceed the TDP.
Things like the Noveske barrel profile, and M249 barrel steel.
Things like salt bath nitride, or the KAC E3 bolt, KAC's IWS Lower Receiver, or LMT's MRP chassis design.
Things like HK MR556's barrel steel, or something. Noveske Switchblock. Custom gas ports. VLTOR's A5 receiver extension.
Those are features that IMHO exceed the spec, proprietary parts that perform better (even marginally) than the standard.