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J P ENTERPRISES
AR-15 SPRING SETS

812872022161 452000105

Description
Ratings (9)

For Smooth, Light Trigger Pull & Reliable Ignition

JPS3.5T produces 3.5 to 4 lb. trigger pull with JP Fire Control parts. This kit is intended for use with JP trigger parts and will not necessarily yield substantial change on standard AR-15 trigger components. Application: Use of this spring kit allows for use of ammunition with low-sensitivity primers such as those found in NATO-spec and various foreign-manufactured ammunitions, but in the case of large-frame ARs and duty/defense rifles, domestic-manufactured ammo is strongly recommended to ensure 100% ignition reliability. The JPS4.0 Tactical Spring kit will yield a 4.0-4.5 lb. trigger pull with JP Fire Control parts. This kit is intended for use with JP trigger parts and will not necessarily yield substantial change on standard AR-15 trigger components produces a 4 to 4.5 lb. trigger pull.

SPECS: Spring steel. Kit includes red-coded hammer spring, yellow-coded trigger return spring, and disconnector spring. For use on AR-style .308 rifles; not for defense or duty applications.

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Customer ratings for J P ENTERPRISES JPS4.0 SPRING KIT

Number of ratings: 9
From brownells.com: 9
Average rating: 4.6

Best with Military /5.56 ammo (18/10/2013)

Called JP and spoke to tech. For all around ignition reliability with Military/5.56 ammo stay in the 4.0-4.5 range. Any lighter you run into primer ignition problems/light strikes. For tactical/defense you DO NOT want a lighter trigger. Trust me a 1/2 lb difference is not really noticeable from the 3.5 kit. Bottom line if you shoot mil spec ammo or 5.56 this works.

Doesnât help with a stock trigger (24/02/2018)

Found out the hard way these won,t change a thing with a stock mil spec trigger. These look to have the exact same hammer spring as mil spec. Bottom line I had the exact same 8 lb. trigger pull after installing these. Do yourself a favor and get the 3.5 version if you want a reduced trigger pull weight. Just make sure to test the reliability with all the ammo you use.

Great for a cheap easy trigger fix (07/06/2012)

Let me start off by saying, one of my lowers has the JP full fire control kit, which by the time all is said and done (kit, speed hammer, anti walk pins) I was well over $200. Now I'm not about to say that swapping out these springs with mil-spec parts is going to result in a trigger as sweet as the JP fire control kit, but it is a tremendous improvement, especially for only $10.

Just swap these springs in, grease up the internals, and you will have a decent trigger that is probably between 4-5 pounds which makes a huge difference from the 7+ lb mil spec springs.

Just a great, quick, easy, cheap fix.

Excellent Performance (08/06/2012)

I fitted this set to my Colt lower after experiencing occasional failres to fire, and it brought it back to life. In a 300 round test of a mix of ammunition brands, including reloads; 100% relability in semi or full-auto.

JP Did it again (24/10/2013)

Bought a Bushmaster C 15 and it's a nice ar for the money with a very heavy trigger from factory and a jp 3.5 trigger springs made a world of difference .

Exceptional Value - Easy to Install (01/11/2014)

Looking for smooth, reduced trigger pull. This is the item. I reduced my pull from 8.5 lbs to 4.5 to 4.8 lbs. more crisp pull with smooth reset.

Nothing I don't like about it. Note: I do get about 1 in 40 misfires using Wolf Ammo but American made works every time. That may be due to the lesser quality of the ammo.

The pull is reduced but I do not think it is dangerously so. As a result I install the JP Enhanced Springs on all my ARs.

$11 Tune-up (21/12/2014)

JPS3.5T Enhanced Reliability Spring Kit, is not a $200+ enhanced trigger job, but it is certainly better than the factory springs. Consistent pull, break, and reset at ~4lbs is very much improved over the factory 7+ lbs. The trouble is that these springs are very popular and most of the time must be back-ordered, additionally they don't sell individual springs must be purchased as a kit (trigger, hammer, disconnector). I will not fault Brownells or JP for $11 I will buy and install on all my ARs.

Great product (11/10/2017)

I installed this product in an AR15 primarily used for 3gun. I was amazed by the improved performace of the trigger group. Outstanding up grade for $10.99. I primarily shoot reloads and I have had no failures to fire. If you are on a budget dont hasitate buy this product.

Works well with stock triggers (09/03/2018)

Using just the hammer spring brought my stock triggerâs pull down from 8lbs. to 5-5 1/2 lbs. with a consistent break. Using the JP trigger and disconnector springs brought the trigger pull down to about 4 1/2 lbs. but the break wasnât as âdistinctâ for me, so I went back to the stock trigger and disconnector springs. No FTFâs so far after shooting 200 rounds of various ammo ranging from match to duty to foreign surplus. This product exceeded my expectations.

Read 9 more ratings on brownells.com

21.9 22.9 2 GBP

Product no.: 452000105
J P ENTERPRISES JPS4.0 SPRING KIT
Mfr Part: JPS4.0 812872022161 JPS4.0 Enhanced Reliability Spring Kit

21.9 GBP 1 £21.90 *

1 In stock, delivery from UK warehouse within 2-3 days

Specs: Make: AR-15

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Description

JPS4.0 Enhanced Reliability Spring Kit

Attributes

Make: AR-15 Delivery weight: 0.005kg Shipping height: 10mm Shipping width: 104mm Shipping length: 175mm UPC : 812872022161

Item details

Made in USA

Product no.: 452000104
J P ENTERPRISES JPS3.5T SPRING KIT
Mfr Part: JPS3.5T 812872022154 JPS3.5T Enhanced Reliability Spring Kit

22.9 GBP 15 £22.90 *

Delivery time approx. 7-14 days.
More than 10 pieces in USA warehouse

Specs: Make: AR-15

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Upgrade your AR-15 with the J P ENTERPRISES JPS4.0 Spring Kit 🌟 for enhanced reliability and performance. Perfect for .308 rifles!

Description
Ratings (9)

For Smooth, Light Trigger Pull & Reliable Ignition

SPECS: Spring steel. Kit includes red-coded hammer spring, yellow-coded trigger return spring, and disconnector spring. For use on AR-style .308 rifles; not for defense or duty applications.

More...

Customer ratings for J P ENTERPRISES JPS4.0 SPRING KIT

Number of ratings: 9
From brownells.com: 9
Average rating: 4.6

Best with Military /5.56 ammo (18/10/2013)

Doesnât help with a stock trigger (24/02/2018)

Great for a cheap easy trigger fix (07/06/2012)

Excellent Performance (08/06/2012)

JP Did it again (24/10/2013)

Bought a Bushmaster C 15 and it's a nice ar for the money with a very heavy trigger from factory and a jp 3.5 trigger springs made a world of difference .

Exceptional Value - Easy to Install (01/11/2014)