Originally Posted by
grnamin
I ordered a CHPWS Acro plate (3 screws), too, since I wanted to compare it to the Dawson plate. The P-2 sits a little lower on the CHPWS plate. It's thinner than the Dawson plate.
Rear sight on the Dawson can be drifted to adjust windage. CHPWS rear sight is fixed.
Tried out the Acro on CHPWS at the range this morning. After about 25 rounds, I noticed that the Acro was loose, but the mounting screw was still fully tightened and the plate was secure. Switched to the Dawson plate. After about 100 rounds, the Acro was still secure. Neither Dawson or CHPWS had o-rings installed. The CHPWS didn't come with any. I also have their older, single screw version. It came with o-rings, but I couldn't figure out where to put them. The Dawson has divots where the o-rings are pre-installed. I removed them in order for the Acro to sit flush.
Here's a weird observation:
When the P-2 is held in place with my fingers on the Dawson plate, it sits flush, but when it's secured with the mounting wedge and screw tightened, it's raised up with a gap about the thickness of a average business card.
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