Installing and testing a GMAC Custom Parts flat top valve and piston in my Crosman 1377 air pistol/ air rifle. There aren't many instructions on how to do this so hopefully this well be a usable how-to!
00:00 Introduction
02:10 Disassembling the Crosman 1377
09:49 Fitting the Flat Top Valve and Piston
20:01 Reassembling the Crosman 1377
26:17 Chronograph Power Testing
30:10 Conclusion and Outro
The GMAC flat top kit that I have fitted:
gmaccustomparts.com/new-blue-...
Негізгі бет Crosman 1377 Flat Top Valve and Piston - Install + Chrony
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