View Full Version : Drop-in triggers for DPMS pattern .308 AR

06-03-2010, 9:06 PM
I'd like to put a nicer trigger in my DPMS pattern .308 AR, but I'm not sure what fits and what doesn't. I know the LPKs are different. I have Bill Springfield modified DPMS parts in there now and the break is clean, but just way too heavy for my taste. I'd like to put a Timney trigger in it, but will the normal AR pieces drop in or do I need a 308-specific piece?


06-03-2010, 9:18 PM
Timney triggers due fine, but they may not have enough oomph for all .308 primers. I had an AR-15 Timney in my .308 AR and sometimes I would get the VERY occasional light primer strike but that could very well have been due to it not being 100% into battery, which seems to happen sometimes with the .308 ARs ive played with.

06-03-2010, 11:24 PM
FCG of DPMS pattern AR10 rifles are identical to AR15's. Most any aftermarket trigger will work.

06-03-2010, 11:58 PM
Dpms pattern does not have a firing pin spring like the ar10. You're good to go w/ an AR15 trigger.

06-04-2010, 2:28 AM
It is suggested that you use a heavier spring on AR-10's, other than that any AR-15 trigger assy will fit a DPMS lr-308

06-04-2010, 7:29 AM
My DPMS 308 LPK trigger spring was causing a lot of light primmer strike on my surplus 308 ammo and the trigger pin was moving out.

I replaced trigger set with RRA two-stage trigger set and added KNS Hammer and Trigger Pin set. The new trigger mod is great, able to shoot all ammo and no more issue with floating pins.

Any trigger from an AR platform will work but consider using a 'beefier' hammer and trigger pin set due to the 308 power.

06-04-2010, 1:09 PM
Timney makes an "AR-10" specific drop in trigger:

I have not used the above trigger in the 308 platform personally. I got a Geissele trigger in mine & have had no issues.

06-04-2010, 1:19 PM
My Armalite AR has a geissele in it, It was used in an AR15 and it works fine in the 10 platform. It does have heavier springs as described and I haven't experienced any failures

06-04-2010, 1:26 PM
I second the Geiselle trigger.

06-04-2010, 2:51 PM
Well depending on what DPMS "style RCVR" you are using the Timneys might fit or not....if its a FULTON they won't fit....

But usually if its more of a STD trigger set-up like Rock River, Geisle..JP...those work in about any rcvr...;)

06-04-2010, 5:20 PM
Or get the Wilson Combat TTU.

06-04-2010, 6:14 PM
I have a CMMG dpms pattern lower and fitment has been an issue with ar 15 triggers.

06-04-2010, 7:22 PM
I have a CMMG dpms pattern lower and fitment has been an issue with ar 15 triggers.

That's an issue with your lower, not the triggers. In this case, it's truely you get what you paid for, and hopefully you didn't pay much for a CMMG.

06-05-2010, 6:27 AM
Absolutely correct and I didn't mean to imply that it was a problem with the trigger(s), just a warning to those contemplating buying a CMMG lower.

06-05-2010, 6:32 AM
Anyone tried one of these?

SR Gold Trigger System (http://pact.com/index.php?option=com_virtuemart&page=shop.product_details&flypage=shop.flypage&product_id=58&vmcchk=1&Itemid=1)

06-05-2010, 7:01 AM
I have, and it actually fit my lower as well.

06-05-2010, 8:16 AM
I have, and it actually fit my lower as well.

Any more info? How does it feel? Light strikes? Thanks

06-05-2010, 1:59 PM
Crisp letoff, easy installation. No problems to date. If you don't like long first stages this is a good trigger for you. Personally I like Geiselle a little better but I have a friend I shoot with sometimes who prefers the gold trigger.

EBR Works
06-05-2010, 3:39 PM
For something a little cheaper than the Gieselle, try a Jewell trigger. I have one in a POF lower/DPMS upper .308 build and it's worked flawlessly for 1K rounds plus.

06-05-2010, 4:00 PM
Im running a timney in my .308 dpms pattern and Could not be happier, great trigger, no modification required and it has more than enough "umph" for the primers.

06-05-2010, 4:03 PM
I have a timney in my AR10 and have had zero problems with it.

06-05-2010, 5:07 PM
ive got a timney in my pof .308 and completely love it

06-06-2010, 8:53 PM
Thanks for all the great info everyone! I have an Iron Ridge lower and it sounds like I'm gtg with just about any AR-15 trigger. I have a Jewell trigger in my Rem. 700 and I love it. Only reason I mentioned the Timney by name in my initial post is that it seems to be a favorite (along with the Gieselle) among the AR crowd.