Easy Heavy Trigger Pull Fix

QuanLoi · 08-19-2012, 10:28 PM

My byf 42 Luger with all parts matching suffered from an unbelievably heavy trigger pull. The trigger pull was off the scale for every gauge I own and broke only when it reach the limit of travel. For me to fire the gun required a two hand grip with the index finger of my right hand on the trigger and the thumb of my left hand over my index finger both pulling at the same time.

The trigger plate on the left side of the gun has a lever whose horizontal portion fits into the fork of the trigger, which when pulled, moves the vertical portion of the lever and pushes it against the trigger bar plunger.

Now here's the fix: I mixed up a small batch of JB Weld and applied it to the top surface of the horizontal portion of the trigger lever - raising its surface (in my case) about a sixteenth of an inch. When the trigger is pulled the trigger fork comes in contact with the top (raised) portion of the trigger lever which increases the travel of the vertical portion of the lever that comes in contact with the trigger bar plunger. No heating of parts, no bending either. If for any reason you wish to remove the JB Weld, a razor or sharp chisel will slice it off.

It should be noted that a very small amount of JB Weld is necessary and the height gain on the lever should only be about 1/32 to 1/16 of an inch.

The result, in my case, is a trigger pull of five pounds.

(I hope I explained everything clearly...)

alanint · 08-19-2012, 11:16 PM

I've suggested this very JB Weld fix in the past, (once being mocked for it by a now banned member). Adding surface reduces the engagement time and effort between the trigger levber and sear.

Edward Tinker · 08-19-2012, 11:28 PM

I have seen several levers with what looked like this, but to tell you the truth, never tried it myself, nor figured it could be this easy....

Thanks guys

Ice · 08-20-2012, 06:11 AM

Excellent idea. Thanks!

Charlie

JTD · 08-20-2012, 07:09 AM

Check your trigger spring to see if it is either too long, or stiff. I had one once that the spring change fixed. John

CJS57 · 08-20-2012, 07:18 AM

Seems like that fix would remove any slack between those 2 parts. Not sure how it increases the travel? Don't doubt it works, just trying to figure this out here.

QuanLoi · 08-20-2012, 08:18 AM

Quote: Seems like that fix would remove any slack between those 2 parts. Not sure how it increases the travel? Don't doubt it works, just trying to figure this out here.

If the horizontal portion of the L shaped trigger lever is higher and the trigger fork moves it down the same amount when the trigger is pulled, and the pivot is in the corner of the L, the vertical extension will move further to the right.

Hope this makes sense...

08-19-2012, 10:28 PM	#1
QuanLoi User Join Date: Jul 2012 Posts: 5 Thanks: 0 Thanked 2 Times in 1 Post	Easy Heavy Trigger Pull Fix My byf 42 Luger with all parts matching suffered from an unbelievably heavy trigger pull. The trigger pull was off the scale for every gauge I own and broke only when it reach the limit of travel. For me to fire the gun required a two hand grip with the index finger of my right hand on the trigger and the thumb of my left hand over my index finger both pulling at the same time. The trigger plate on the left side of the gun has a lever whose horizontal portion fits into the fork of the trigger, which when pulled, moves the vertical portion of the lever and pushes it against the trigger bar plunger. Now here's the fix: I mixed up a small batch of JB Weld and applied it to the top surface of the horizontal portion of the trigger lever - raising its surface (in my case) about a sixteenth of an inch. When the trigger is pulled the trigger fork comes in contact with the top (raised) portion of the trigger lever which increases the travel of the vertical portion of the lever that comes in contact with the trigger bar plunger. No heating of parts, no bending either. If for any reason you wish to remove the JB Weld, a razor or sharp chisel will slice it off. It should be noted that a very small amount of JB Weld is necessary and the height gain on the lever should only be about 1/32 to 1/16 of an inch. The result, in my case, is a trigger pull of five pounds. (I hope I explained everything clearly...)

08-19-2012, 11:16 PM	#2
alanint User Join Date: Mar 2008 Location: Marco Island, Florida Posts: 4,867 Thanks: 1,685 Thanked 1,917 Times in 1,193 Posts	I've suggested this very JB Weld fix in the past, (once being mocked for it by a now banned member). Adding surface reduces the engagement time and effort between the trigger levber and sear.

08-19-2012, 11:28 PM	#3
Edward Tinker Super Moderator Eternal Lifer LugerForum Patron Join Date: Jun 2002 Location: North of Spokane, WA Posts: 15,966 Thanks: 2,066 Thanked 4,595 Times in 2,116 Posts	I have seen several levers with what looked like this, but to tell you the truth, never tried it myself, nor figured it could be this easy.... Thanks guys

08-20-2012, 06:11 AM	#4
Ice User Join Date: Mar 2009 Location: Texas Posts: 552 Thanks: 13 Thanked 69 Times in 57 Posts	Excellent idea. Thanks! Charlie

08-20-2012, 07:09 AM	#5
JTD User Join Date: Feb 2005 Location: PA Posts: 428 Thanks: 218 Thanked 410 Times in 151 Posts	Check your trigger spring to see if it is either too long, or stiff. I had one once that the spring change fixed. John

08-20-2012, 07:18 AM	#6
CJS57 User Join Date: Nov 2011 Posts: 224 Thanks: 0 Thanked 81 Times in 41 Posts	Seems like that fix would remove any slack between those 2 parts. Not sure how it increases the travel? Don't doubt it works, just trying to figure this out here.

08-20-2012, 08:18 AM	#7
QuanLoi User Join Date: Jul 2012 Posts: 5 Thanks: 0 Thanked 2 Times in 1 Post	Quote: Seems like that fix would remove any slack between those 2 parts. Not sure how it increases the travel? Don't doubt it works, just trying to figure this out here. If the horizontal portion of the L shaped trigger lever is higher and the trigger fork moves it down the same amount when the trigger is pulled, and the pivot is in the corner of the L, the vertical extension will move further to the right. Hope this makes sense...