One very nice thing about the Polys (& Norincos) is that geometry/dimension wise, the receivers are pretty much spec with USGI receivers. Unfortunately, with the Springfield made receivers that may be a hit or miss proposition. If one is planning on scoping their rifle, one might be better off with the Chinese made receivers. There are too many horror stories floating around about SAI receivers not being in spec, and needing a specially machined mount to work. Smith Enterprises supposedly has a special setup for measuring this. Plus, the bolt holes for the mounts are often miss machined/drilled/tapped on the SAI receivers.Another good one is a post on the differences between Chinese and USGI parts.
The major "problem" areas for the Chinese receivers are:
#1. Sight knobs may be soft. Easy fix. Garand kobs work, and aren't very expensive. Note, all Chinese made knobs are marked WCE.
#2. Trigger/hammer may be soft. Easy fix. Again, Garand parts work, and aren't very expensive. Chinese made hammers and triggers are unmarked, while USGI hammers and triggers are stamped with letters and numbers(triggers may be iffy).
#3. Op rod spring may be a bit small and soft. Very easy fix. Replace with USGI spring.
#4. Stock is soft and ugly. Easy fix. Replace with USGI stock. Though there needs to be a slight mod to the stock to the shorter Chinese connector lock pin to stay in place.
#5. Bolt may need replacing. Most difficult fix. Hopwever, just replacing the bolt with a USGI bolt fixes any headspace issues. Often, it requires very little work other than a bit of lapping.
None of these fixes is expensive, and most can be done by the person with little or no experience.
At a good enough price, and I could easily talk myself into another Chinese rifle...............not that I need one. Unfortunately, the price keeps going up, since more and more people are finding out how good a bargain they are.
There's also a post regarding how to tell USGI mags from fakes.
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