I have a md. 640 ka, trigger guard is plastic and warped. Brownells offers an aluminum guard for mds44 etc. but doesn't say 640s. Picture looks like the one on my 640 ka Chuckster. Does anyone out there know the answer or has one of each to compare? I really like the rifle very accurate and even has a genuine walnut stock, needs to be refinished. Another winter project. I thank yu in advance for any info.