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HK91 Trigger Job
- Thread starter Uhave2
- Start date
Destructo6
New member
William's Trigger Specialists should be able to do a trigger job on your trigger pack. I believe they also offer a "set" trigger that adds a position between "S" and "F". They have contact information at www.hk91.com 's yellow pages.
Dave Finfrock
New member
If you're going aftermarket, Williams is the place to go. It's been some time since I've contacted Williams, but it used to be the standard HK trigger was about $100, $150 for the set trigger.
The PSG1 trigger is very good, but pricey (like $350 or more these days).
I've heard, heard mind you...as in second hand info...that the aftermarket jobs don't hold up under heavy shooting as well as the PSG1 unit. Supposedly Gunsite and Thunder Ranch have seen some failures with all the aftermarket jobs, while none with the PSG1.
My personal experience says the Williams conversion is fine. I've had experience with three HKs with the Williams unit and no problems at all. Then again, these guns weren't seeing many 100s of rounds a day.
If it were me, I'd go Williams unless you got a helluva deal on a PSG1 unit.
The PSG1 trigger is very good, but pricey (like $350 or more these days).
I've heard, heard mind you...as in second hand info...that the aftermarket jobs don't hold up under heavy shooting as well as the PSG1 unit. Supposedly Gunsite and Thunder Ranch have seen some failures with all the aftermarket jobs, while none with the PSG1.
My personal experience says the Williams conversion is fine. I've had experience with three HKs with the Williams unit and no problems at all. Then again, these guns weren't seeing many 100s of rounds a day.
If it were me, I'd go Williams unless you got a helluva deal on a PSG1 unit.
The key to lightening the trigger on the HK91 is reducing the weight of the trigger return spring. This is where about 90% of the extra drag weight is loaded in. This little torsion spring is a single loop of wire. It can be reduced in weight/pressure by several methods, or a new spring can be fabricated from music wire of a smaller diameter.
The next thing necessary is reducing the sear and hammer hook height slightly, and polishing their interface. These two steps render a very nice trigger with a standard two stage take up and a nice crisp break at the end.
Other niceties like polishing the rest of the pins and friction surfaces render an even better "feel".
Keeping the whole mechanism clean is good too. I have seen many HK weapons that had never been cleaned here, and the amount of grit and grime in the area was making the trigger "act up".
The CETME version of the HK91 rifle has a dual trigger return coil spring, and can be lightened dramatically by the simple expedient of pulling one of the spring legs off of the trigger return pressure bar that it lays on.
Kevin "Mad Dog" McClung
MD Labs
maddog@maddogknives.net
The next thing necessary is reducing the sear and hammer hook height slightly, and polishing their interface. These two steps render a very nice trigger with a standard two stage take up and a nice crisp break at the end.
Other niceties like polishing the rest of the pins and friction surfaces render an even better "feel".
Keeping the whole mechanism clean is good too. I have seen many HK weapons that had never been cleaned here, and the amount of grit and grime in the area was making the trigger "act up".
The CETME version of the HK91 rifle has a dual trigger return coil spring, and can be lightened dramatically by the simple expedient of pulling one of the spring legs off of the trigger return pressure bar that it lays on.
Kevin "Mad Dog" McClung
MD Labs
maddog@maddogknives.net