Author
Message
awastatyme
Offline
Posts: 21
Feedback: 100% (3)
Posted: 7/27/2012 3:09:47 AM EST
I was looking on joeboboutfitters.com and saw this J&R Research Triger Adjuster
How does this reduce triger pull and shorten creep?
Would this be worth the money?
Amish_Bill
Celebrating the Inner Cranky since 15:13 Yesterday
NRA
Offline
Posts: 4529
Feedback: 100% (12)
Link To This Post
Posted: 7/27/2012 3:22:29 AM EST
[Last Edit: 7/28/2012 5:16:33 AM EST by Amish_Bill]
Looks like it has a longer set screw inside a hollowed out grip screw. If your grip screw hole goes all the way into the floor of your lower, the internal extension will come up and restrict the motion of the trigger. It is described as adjusting the pre-travel on your trigger. This means it will come up under the trigger's tail and bring the resting position of the trigger nose (sear) closer to the release point. The odd tool pictured is an extended bit to let you adjust it through the bottom of the grip

As best I can recall, Superior and other companies have a similar adjustment built into their lowers. Those usually require you to remove the grip to adjust them. This does not, and I'm somewhat happier with this idea despite the part price.
Instructor: NRA Rifle/Pistol - Utah CCW

Every other species kills off their stupid......we cater to them. - spin-drift
Nobody ever called 911 & said I just did something smart. -- TheFlynDutchman
Direct-Drive
Offline
Posts: 2948
Feedback: 0% (0)
Link To This Post
Posted: 7/27/2012 5:07:15 PM EST
Here you can clearly see the grip screw "bore" and how "up pressure" from this point would affect trigger break.


gonzosc1
Offline
Posts: 571
Feedback: 0% (0)
Link To This Post
Posted: 7/28/2012 4:03:43 AM EST
save your money. $35 + shipping,,,forget that.

things you need,
#1..shortened grip screw. if you have an after market grip you may already have a short grip screw. I know the Moe grip screw work for this!

#2..1/4x28 tap. forgot what I payed for this but it was just a few dollars.

blue loctite.

and go here.
http://www.junkyardgenius.com/firearms/ar-15/ar08.html

I did this and added a JP yellow reduced trigger spring and the JP red heavy hammer spring (JP's enhanced trigger kit $15-$19).
ended up with a 4lb trigger pull and almost no creep. but keep in mind this mod does nothing for the trigger reset travel!!

in total this mod cost me around the same price as what joebob is selling. but its way more then what you get from joebob for the money!

Direct-Drive
Offline
Posts: 2950
Feedback: 0% (0)
Link To This Post
Posted: 7/28/2012 4:29:17 AM EST
Originally Posted By gonzosc1:
save your money. $35 + shipping,,,forget that.

things you need,
#1..shortened grip screw. if you have an after market grip you may already have a short grip screw. I know the Moe grip screw work for this!

#2..1/4x28 tap. forgot what I payed for this but it was just a few dollars.

blue loctite.

and go here.
http://www.junkyardgenius.com/firearms/ar-15/ar08.html

I did this and added a JP yellow reduced trigger spring and the JP red heavy hammer spring (JP's enhanced trigger kit $15-$19).
ended up with a 4lb trigger pull and almost no creep. but keep in mind this mod does nothing for the trigger reset travel!!

in total this mod cost me around the same price as what joebob is selling. but its way more then what you get from joebob for the money!


This is great for some people.
Others might want the luxury of being able to tweek the setting with the grip in place.

There was a machinist/member on Maryland Shooters that was selling the deluxe kit for about $18.

madcratebuilder
Offline
Posts: 1851
Feedback: 100% (6)
Link To This Post
Posted: 7/28/2012 5:25:52 AM EST
Originally Posted By Direct-Drive:
Originally Posted By gonzosc1:
save your money. $35 + shipping,,,forget that.

things you need,
#1..shortened grip screw. if you have an after market grip you may already have a short grip screw. I know the Moe grip screw work for this!

#2..1/4x28 tap. forgot what I payed for this but it was just a few dollars.

blue loctite.

and go here.
http://www.junkyardgenius.com/firearms/ar-15/ar08.html

I did this and added a JP yellow reduced trigger spring and the JP red heavy hammer spring (JP's enhanced trigger kit $15-$19).
ended up with a 4lb trigger pull and almost no creep. but keep in mind this mod does nothing for the trigger reset travel!!

in total this mod cost me around the same price as what joebob is selling. but its way more then what you get from joebob for the money!


This is great for some people.
Others might want the luxury of being able to tweek the setting with the grip in place.

There was a machinist/member on Maryland Shooters that was selling the deluxe kit for about $18.



+1 on adding the springs.

If you drill the grip screw for the allen wrench it's $1 DIY mod. Works great with the oem single stage triggers and two stage triggers. While your in there doing a DIY you can drill & tap a second hole under the take down pin and add a adjustable set screw to tighten the upper fit.

JoeBob1901
Offline
Posts: 125
Feedback: 0% (0)
Link To This Post
Posted: 7/29/2012 7:20:56 AM EST
The J&L is a bit pricey honestly. We sell a house branded trigger adjuster that has the grip screw tapped to receive the trigger adjuster screw inside of it, rather than in front of it. You can adjust the trigger without removing the grip screw. They're only $17.95, with the wrench. IMO, it's a much better option than tinkering with a screw in FRONT of the grip screw, as you generally have to remove the grip screw to adjust your trigger. That is unless you drill out the grip screw to allow a long allen wrench to go through it.