Palmetto State Armory HIPERTOUCH® LPK
We start with one of our quality lower parts kits, and replace the fire control group with a Hyperfire Hipertouch 24 trigger. The HIPERTOUCH® is an adjustable single stage trigger that allows you to set the trigger pull between 2 and 4 lbs.
The stock “AR” fire-control design is elegantly simple and robust, but unfortunately, the trigger weight is a high 7 to 9 pounds and the pre-travel is long and gritty, which makes shooting it for high accuracy an almost impossible chore. And while it’s possible to improve the stock performance by manually polishing the high-friction trigger and hammer sear surfaces, the end result is only marginally better if at all.
So, ambitious sportsmen and marksmen have turned to trigger upgrades with varying degrees of satisfaction. The better replacements are one and two-stage triggers with fixed final weights ranging from between 2½ and 4½ pounds with what some call a glass rod or candy cane trigger break. Some of these devices require factory or user calibration, maintenance, and/or replacement for wear or doubling. Some of these devices also employ reduced power springs, which can compromise reliable ignition for the dream trigger weight.
The answer for those shooter’s looking for a single-stage and very much improved, match quality, “AR” trigger upgrade that delivers high performance is the HIPERTOUCH® 24. It functions just like the “AR” fire-control we’ve all dreamed of. It nests in unmodified standard AR-15® and AR-10® type lower receivers in the same way as stock “AR” triggers and hammers without having to remove the safety selector. It is comprised of three subassemblies: the trigger, hammer, and toggle, spring groups. All the parts are made from carbon steel alloys that have been hardened for wear and strength. It features exceptionally low trigger weights with smooth pre-travel, a very clean hammer release with no break, match action response, and faster hammer lock-up. Only now with HIPERTOUCH® trigger and hammer actions does "AR" trigger "squeeze" have real meaning.
The real culprit behind high trigger pull weight is high sear impingement force that produces high friction. To get around that, the stock “AR” trigger and hammer mechanical advantage was changed to reduce the impingement force on the trigger sear. Designers of two-stage products changed the functional location of the primary sear; this design has not, retaining the stock design’s single-stage simplicity. This is important for when stock triggers are pulled, the hammer cam-action signals hammer fall is imminent. When 2-stage triggers are pulled, the final higher weight stage also signals hammer fall. This leads to the flinching problem we all know about. Some like to say the better 2-stage triggers have glass rod or candy-cane like break to sell the idea that they don't signal hammer fall. In any case, the HIPERTOUCH® 24 does not signal hammer fall because the trigger weight is constant over the entire stroke.