There are several good kits out there.  I looked at the JP Enterprises website and theirs is very nice and it should be a drop-in for you DPMS M4 carbine clone. 

 

The question only you can answer is whether the trigger on your DPMS needs it.  The M4 hardly qualifies as a match rifle.  That having been said, a good adjustable trigger would certainly make it better.  At $279 for the unit, that's a pretty hefty chunk of change, though.  

 

The current Brownell's on-line catalog has some other brands of trigger pull improvement kits for AR-type rifles and carbines.  You may want to give them a check.  Several are less than the JP Enterprises version.  Installation is still a drop-in.  I have a trigger pull improvement kit on my scoped AR-15A2 clone.  The trigger pull is improved and I like it.  However, the trigger pull on my other iron sighted rifle is adequate also.   I've thought about trying a different drop-in trigger kit, but my resources seem to get diverted for other projects.

 

What kind of groups does your M4 get now?  DPMS has a reputation for being a pretty accurate rifle right out of the box. 

 

What kind of engagement ranges do you expect to use the rifle?  The M4 is designed for compactness and the shorter barrel does decrease the effective range over the standard rifle. 

 

The current philosophy with the M4 is to marry it to a quick reaction type sight like a red dot for fast target engagement.  The standard DPMS trigger would certainly be suitable when used this way.  That is, it's more like snap shooting than slow, deliberate match shooting.  You'll have to answer the question of what kind of shooting you'll be doing.  That sould determine whether a trigger kit is in your future. 

 

 

Thanks for the info Gunns, my rifle shoots around 2" groups at 100yds so ya its a pretty accurate gun, but I often go shooting with guys from my local Sherriffs Dept. and you know the drill "my rifle has got more bells and whistles than yours dose". Boys with thier toys. I run a Aimpoint ML3 for my optics. Love it great point and shoot sight. Just figured I'd add something that most of the guys don't have on thier rifles. Ill do some more checking. Again thanks for the info.

                                  mike

p.s. Did I hear u right that u live in Wis. same here I'm 60 miles east of the twin cities where u at if ya dont mind me askin? 

Ah, you were close, but not quite.  I live on the other side of the border, behind enemy lines in IL.  Find Beloit, WI on the map and go diredctly south about 20 miles and you hit Rockford, IL.  That's my metro area -- Rockford, Loves Park, Machesney Park.

 

Sounds like the M4 you have is nicely tricked out.  If you're getting that kind of groups with the rig you have, then why bother?  If you had the AR equivalent of a designated marksman's rifle (DMR) with a heavy barrel, flattop receiver, and pricey scope, then the trigger kit would make much more sense.  However, you're doing tactical work here and that's the M4's main forte. 

 

If I was going to Afghanistan or Iraq and was carrying an M4/M16 for social encounters, I would prefer an upgraded package.  Those upgrades would be: (1) caliber and (2) gas operating system.

 

For better terminal effects on the target then consider the 6.8x43 SPC round (6.8 Remington).  All that's required is a switch iof uppers and magazines.  (The 6.8 magazine looks like a standard 30-round 5.56x45 NATO, but it's made of steel and holds 25 rounds.)  Alternatively there's the 6.5 Grendel, but I like the 6.8 SPC better.  The 115-grain, .270 caliber bullet delivers TWICE the energy to the target as a 62-grain, .224 caliber bullet.  In this department, I'd also consider a gas piston operated upper receiver -- I can think of at least three offerings in this area -- where the conventional gas tube/bolt carrier arrangement is replaced by a gas piston operated bolt carrier like the FN FAL.  For me, the state of the art offering in an M4/M16/AR -type rifle would be a gas piston upper and the 6.8 SPC caliber.  THAT's just about perfect.