Aluminum Receivers On Thompsons?
Posted 05 September 2004 - 09:20 PM
Posted 05 September 2004 - 10:01 PM
Posted 05 September 2004 - 10:30 PM
Posted 05 September 2004 - 10:59 PM
I could be wrong, but I feel better with the steel receivers.
Just my .02
Posted 06 September 2004 - 08:50 AM
Posted 07 September 2004 - 09:36 AM
This alloy is actually stronger than the steel (12L14) believed to have been used in WH & Kahr receivers (73 ksi vs. 70 ksi yield), but is slightly softer at Bn 150 vs. Bn 163. However, the anodic coating is as hard or harder than the heat treated steel receivers of GI guns. If this coating is not disturbed, feed ramp and bolt pocket life should be very good. The geometry of the Thompson feed ramp design is such that wear should be minimal.
Here’s the rub (pun intended), if the geometry of the feed ramp is not correct, the anodizing will be removed in the machining to establish the correct geometry or the impacting bullets during feeding will wear it prematurely.
I worry a lot more about the frame latch area that I do feed ramps or bolt pockets; if there is any axial play between the frame and receiver, the frame latch hole in the receiver and the seat in the frame will wear quickly.