Unobtanium Posted November 24, 2013 Share Posted November 24, 2013 (edited) It's hard to tell, but where your hammer has peened, has the finish flaked off on the side any, or not? How do the contacts on the trigger/hammer engagement points look? It's tempting to use the OEM hammer and the FFT dis-connector and trigger. Also, FYI. where the hammer would contact the disconnector on my OEM hammer during the back-stroke is indeed shiny as if it kisses said part every cycle. Edited November 24, 2013 by Unobtanium Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted November 24, 2013 Author Share Posted November 24, 2013 I looked into this more. I dug out my old OEM fire control group (FCG) and disassembled both trigger packs. I compared all four hammers closely. The OEM hammer shows the same deformation as the FFT hammer. Of all the hammers, the Geisselle shows the least amount of deformation. The only issue encountered with the Geisselle hammer is its odd behavior when trying to cock the hammer with the weapon on safe. For some reason, Geisselle changed the hammer profile so that it contacts the trigger more on the downward stroke. The Geisselle offers the largest surface area for engagement of the sear as well. I'd say that the Geisselle hammer is the best of the three. The hammer always makes contact with the disconnector and polishes the finish off. That is present in all samples I have. The hammer compresses the disconnector during each stroke. Basically they're metal on metal rubbing during each cycle until the hammer slips past the disconnector's sear. Take a look at the following pictures to decide for yourself. Also, if you open the image into a new window, they'll be much bigger. Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted November 24, 2013 Author Share Posted November 24, 2013 Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted November 24, 2013 Author Share Posted November 24, 2013 Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted November 24, 2013 Author Share Posted November 24, 2013 Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted November 24, 2013 Author Share Posted November 24, 2013 Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted November 24, 2013 Author Share Posted November 24, 2013 Quote Link to comment Share on other sites More sharing options...
Unobtanium Posted November 24, 2013 Share Posted November 24, 2013 Huh. Looks good to go! Mirrors Oem. Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted November 26, 2013 Author Share Posted November 26, 2013 I was surprised too. I think I'll pick up another Geisselle hammer. Seems it's heat treatment is superior to OEM and FFT. Quote Link to comment Share on other sites More sharing options...
jwk7443 Posted December 10, 2013 Share Posted December 10, 2013 Awesome pictorial on the trigger install. Couldn't have done it without your post. THANKS! Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted December 12, 2013 Author Share Posted December 12, 2013 Glad it helped. Quote Link to comment Share on other sites More sharing options...
EarthRoamer Posted March 19, 2014 Share Posted March 19, 2014 Now, take your snap ring pliers and remove the Trigger Guard Pin Spring from the Trigger Group. OK, so I'm trying to install the Trigger Pin Guard Spring (TPGS) and it doesn't seem to be engaging the slots in the Trigger Pin Bushing (TPB). After I install the Trigger Pin Guard Spring, if I tap lightly on the Trigger Pin Bushing, the bushing will tap right out. It doesn't seem like the spring is engaging in the slots. Did I somehow damage the TPB? It is a brand new TPGS. Any thoughts on what to do? Thanks StrangerDanger for your pics and post, they have been a great help! Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted March 20, 2014 Author Share Posted March 20, 2014 Sounds like you haven't gotten the snap ring to actually engage into those cuts along the side of the trigger bushing pin. If you think of the snap ring as a horse shoe shape, with the open end being the top, or 12 o'clock. The notches of the TPGS should be at the 3 o'clock and 9 o'clock position. Here is another unrelated tip for installing the carrier dog or bolt latch's pin and spring. You can remove the pin and spring when the unit is assembled by compressing the spring and pin. It will then disengage from the bolt latch and pull it away from the assembly. This will help reduce the number of parts you will be trying to wrangle while reassembling the trigger group. Quote Link to comment Share on other sites More sharing options...
EarthRoamer Posted March 20, 2014 Share Posted March 20, 2014 Thanks StrangerDanger, your diagnosis was spot on. I didn't have the spring oriented correctly. Once I oriented it correctly it engaged the slot. Quote Link to comment Share on other sites More sharing options...
Vertigofirearms Posted April 6, 2014 Share Posted April 6, 2014 Found this video today while browsing, Relates to the M4 Trigger group Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted April 6, 2014 Author Share Posted April 6, 2014 Good video! Quote Link to comment Share on other sites More sharing options...
M2_shootr Posted April 6, 2014 Share Posted April 6, 2014 The only thing that is a bit incorrect is the pin retainer type. The video shows the wire spring type, not the clip that is removed and installed with c-clip plyers. Quote Link to comment Share on other sites More sharing options...
Vertigofirearms Posted April 7, 2014 Share Posted April 7, 2014 Only M4 and M3s use the Crescent Clip. Quote Link to comment Share on other sites More sharing options...
M2_shootr Posted April 7, 2014 Share Posted April 7, 2014 Only M4 and M3s use the Crescent Clip. I realize that,......did not know the thread had changed directions from the M4. Makes sense now...... Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted April 7, 2014 Author Share Posted April 7, 2014 Watching the tear down of the m2 pack has shown me how many refinements were made in the m4. Example, the m4 did away with that washer that retains the breech latch. I prefer the snap ring over the wire pin on the trigger bushing. I've heard many M2 owners upgrade the pack to the snap ring from the m4. Quote Link to comment Share on other sites More sharing options...
NHnewbie Posted April 30, 2014 Share Posted April 30, 2014 (edited) Just completed installation of the following on my M4: FFT Trigger FFT Disconnector Geissele Hammer Taran Tactical Oversize Safety Taran Tactical Extended Carrier. Using SD's posts and the recent video on the M2 trigger group, this was quite straight forward even with my very limited experience with this kind of modification. Most challenging steps were removal/installation of the snap ring (due to crappy snap ring pliers) and installation of the disconnector retaining pin. Probably took an hour overall. Would be much faster the second time. Next to install is: Carrier Comp Magazine Carrier Comp Follower & Spring FFT Handguards MeproLight Night Sights Benelli Collapsible Stock GG&G Oversize Bolt Release By my accounting, all these mods should yield six 922® compliant parts. Edited May 1, 2014 by NHnewbie Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted April 30, 2014 Author Share Posted April 30, 2014 Great choices in aftermarket parts. Quote Link to comment Share on other sites More sharing options...
6camaro9 Posted May 1, 2015 Share Posted May 1, 2015 just completed installing my FFT trigger group. thanks for the writeup it very helpful couldn't done without the pics. Quote Link to comment Share on other sites More sharing options...
StrangerDanger Posted May 1, 2015 Author Share Posted May 1, 2015 Glad it helped! Quote Link to comment Share on other sites More sharing options...
kimurabean Posted September 25, 2018 Share Posted September 25, 2018 Where can I get 51- 54? I seem to have misplaced mine. This is always an excellent reference guide. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.