On the Lyman electronic trigger gauge, the trigger of a heavy frame SIG P210-6, serial number P79608, yields a weight of 1.2kg, averaged over 10 pulls. Its immediate heavy frame successor, P79609, fitted with a National Match hammer, releases the sear at an average of 1.23kg. Likewise the heavy frame P210-6, serial number P79103 in 7.65 Para, at 1.24kg. That's about as good as you can get in a tuned service grade self-loading pistol, and much lighter than Swiss pistol target shooting competitions allow, by requiring a trigger weight above 1500 grams. More typical are the measurements of the heavy frame SIG P210-6, serial number P79136, which yields a weight of 1.82kg, averaged over 10 pulls, the Borchardt C93, serial number 1774, releasing the striker at 2.59kg, and the Krieghoff P08, serial number 3249, weighing in at a hefty 3.48kg.
More Swiss service pistol trigger pull weight measurements follow:
- P06/1929 SN 71644: 3.80kg;
- P06/1929 SN 77493: 2.57kg;
- P06/1929 National Match SN 59951: 2.64kg;
- P06/1929 National Match SN 65721: 2.15kg;
- P210-6 SN P86618: 1.78kg;
- P210-2 SN P79980: 1.67kg;
- P210-1 SN P77209: 1.94kg;
- P210-2 SN P74064: 1.86kg;
- P49 SN A204931: 2.88kg;
- P49 SN A156213: 2.90kg;
- P49 SN A107159: 2.75kg;
- P49 SN A105553: 2.56kg.
The double pull lever is the part responsible for regulating the transition between the two stages of the trigger pull of the P210. After the trigger, part #28, takes up the slack to engage the sear, part #23, by way of the trigger rod, part #26, the first stage of the trigger pull is determined mainly by the weight of the trigger spring, part #31, with additional resistance provided by the sear spring, part #24. As the sear rotates around its pin, part #22, it brings all the way back the hammer, part #14, and contacts the double pull lever, part #21. At that point, the double pull lever connects the sear with the mainspring, part #20, providing considerable additional resistance in the second and final stage of the trigger pull, just before the release of the hammer by the sear.
In late production, forged and deep hardened milspec sears and double pull levers were gradually replaced by metal injection molded (MIM) parts of slightly modified profiles. This image is taken from Armbruster, p. 193:
Double pull levers used during the SIG P210 production runs. Nos. 1-4 are milled and hardened. From No. 2 the area between the anterior and posterior pressure ridges was reinforced by adding material. No. 5 is the latest version, produced by metal injection molding.
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