Irving
07-15-2015, 23:36
I recently purchased the APEX Tactical Aluminum Forward Set Sear and Trigger Kit (https://store.apextactical.com/WebDirect/Products/Details/191845) and had it installed at Bowers. Everything went well and I'm loving the new trigger feel. Under dry fire, everything functions normally, but at a recent match, the trigger would not reset every time, essentially turning the gun into a bolt action pistol. Not good for matches, and especially not good for a carry piece. After a little panicking, and a little research, I've found out that this is a known issue that is easily remedied. Essentially, I have the oldest style of M&P (pre-2010) and as such have the old style Sear Housing Block that has a small hole for a small spring. This spring is not robust enough and under recoil causes the sear to "bounce" and the trigger to go dead. I found a thread over on MP-Pistol.com that discusses this very issue. Randy from APEX even makes an appearance. The thread is old (2010) and back then Smith & Wesson had not yet released the updated Sear Housing Block, so at the time Randy was offering to mill out the SHB to fit the larger spring. From reading the entire thread, it appears that the compact pistols are more susceptible to this issue than the full size pistols.
See thread here: http://mp-pistol.com/mp-gunsmithing/25745-trigger-not-resetting-apex-ram-sear.html
Response from Randy Lee of Apex Tactical:
Hi all,
The newer sear blocks use a spring and plunger that measure .125 in diameter. The pre-September (2010) models use a plunger that measures .067- roughly half the diameter. The new springs are much larger as well as longer, which resists deflection during the recoil phase.
If you have our DCAEK or sear, we will charge $7.00 plus return shipping. Our charge for modifying non-Apex sear housing blocks is $25.00 (includes cost of the sear spring and plunger) plus shipping.
Most people who are sending in their blocks for the modification are requesting Priority mail, so add $7.50 for the shipping and insurance.
-Randy
So it should be a simple enough fix of just ordering a new SHB and having it installed. When you purchase the kit, it comes with the newer (longer, wider, stronger) spring. I have mine still in the bag because it wouldn't fit my sear. New SHB can be had from both Brownells and Midway for under $30, but both are out of stock (back order ok) at the time of this post. I've got one on back order from Midway and hope to get it asap. The Sear Housing Block is one of those items that Smith & Wesson will not send directly to customers, so you'll need to order it from a second party source.
Just wanted to pass along the info for those with older M&Ps looking at upgrading their triggers.
See thread here: http://mp-pistol.com/mp-gunsmithing/25745-trigger-not-resetting-apex-ram-sear.html
Response from Randy Lee of Apex Tactical:
Hi all,
The newer sear blocks use a spring and plunger that measure .125 in diameter. The pre-September (2010) models use a plunger that measures .067- roughly half the diameter. The new springs are much larger as well as longer, which resists deflection during the recoil phase.
If you have our DCAEK or sear, we will charge $7.00 plus return shipping. Our charge for modifying non-Apex sear housing blocks is $25.00 (includes cost of the sear spring and plunger) plus shipping.
Most people who are sending in their blocks for the modification are requesting Priority mail, so add $7.50 for the shipping and insurance.
-Randy
So it should be a simple enough fix of just ordering a new SHB and having it installed. When you purchase the kit, it comes with the newer (longer, wider, stronger) spring. I have mine still in the bag because it wouldn't fit my sear. New SHB can be had from both Brownells and Midway for under $30, but both are out of stock (back order ok) at the time of this post. I've got one on back order from Midway and hope to get it asap. The Sear Housing Block is one of those items that Smith & Wesson will not send directly to customers, so you'll need to order it from a second party source.
Just wanted to pass along the info for those with older M&Ps looking at upgrading their triggers.