M78 Topcovers for stamped verses millled receivers

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DunGoterDid
Posts: 95
Joined: Wed Feb 08, 2012 10:53 am

M78 Topcovers for stamped verses millled receivers

Post by DunGoterDid » Sat Dec 15, 2012 10:57 pm

M78 Topcovers for stamped verses millled receivers

What is the difference?
Will one work on the other?
I tried a railed top cover on a milled M78 and there was a tiny bit of play. Is this normal or could the cover been for a stamped rifle?

Thank you in advance
Valmets are sweet

Dave62
Posts: 30
Joined: Sun Sep 28, 2003 9:21 am
Location: NV

Post by Dave62 » Sun Dec 16, 2012 7:31 am

Stamped receiver .308 M78's use a different top cover than Milled .308 M78's. The stamped .308 M78 has a trunion that protrudes and is wider than the receiver like a true RPK, so it has a top cover that is "bulged at he front' to fit over the trunion protrusion in the receiver. Milled receiver .308 M78's use the same top cover as the stamped receiver .223 and 7.62x39 M78's (and M71's for that matter). If the railed cover is for an AK or AK variant it might explain why there is some play. The Valmet top covers with the the 412 type mount usually fit fairly tight.
HTH

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