AR-15 Damaged Lower

Gringo Ed · July 22, 2006, 07:14 PM

I punched out the front disassembly pin too far. The front 1/16" of the detent pin tunnel is broken off. How big of a problem is this and is there a fix? No flames, please. I'm sick over having done this, but I need some sound advice. Thanks!

DnPRK · July 22, 2006, 09:37 PM

Lower receivers are cheap. A high quality replacement lower can be had for $125.

The cost to weld up the breakout, re-drill, file to shape and refinish the lower would be more than the cost of a replacement lower.

**4V50 Gary** · July 22, 2006, 11:07 PM

Mickey mouse fix with J-B Weld to fill, redrill and then a bit of paint.

hodaka · July 23, 2006, 04:50 PM

I'm not sure I understand exactly which pin you are refering to, the one that the upper pivots on (I think not) or the little channel that holds the detent that holds the detent for the pin that holds the big pin that the upper pivots upon (I think this one). If so, could a shorter spring and a longer pin work? You could probably fashion a pin from a small finish nail. I've used JB Weld on motorcycle crankcases a number of times. It is amazing stuff.

shaggy · July 23, 2006, 05:05 PM

Colt has used a screw type front pivot pin on some guns that obviates the need for the detent. I'd try and find a screw type front pivot pin.

July 22, 2006, 07:14 PM	#1
Gringo Ed Junior Member Join Date: January 31, 2006 Posts: 7	AR-15 Damaged Lower I punched out the front disassembly pin too far. The front 1/16" of the detent pin tunnel is broken off. How big of a problem is this and is there a fix? No flames, please. I'm sick over having done this, but I need some sound advice. Thanks!

July 22, 2006, 11:07 PM	#3
4V50 Gary Staff Join Date: November 2, 1998 Location: Colorado Posts: 21,841	Mickey mouse fix with J-B Weld to fill, redrill and then a bit of paint. __________________ Vigilantibus et non dormientibus jura subveniunt. *Molon Labe!*

July 22, 2006, 09:37 PM	#2
DnPRK Senior Member Join Date: August 24, 2001 Location: LC, Ca Posts: 1,917	Lower receivers are cheap. A high quality replacement lower can be had for $125. The cost to weld up the breakout, re-drill, file to shape and refinish the lower would be more than the cost of a replacement lower.

July 23, 2006, 04:50 PM	#4
hodaka Senior Member Join Date: April 23, 2006 Location: South Texas Posts: 2,010	I'm not sure I understand exactly which pin you are refering to, the one that the upper pivots on (I think not) or the little channel that holds the detent that holds the detent for the pin that holds the big pin that the upper pivots upon (I think this one). If so, could a shorter spring and a longer pin work? You could probably fashion a pin from a small finish nail. I've used JB Weld on motorcycle crankcases a number of times. It is amazing stuff.

July 23, 2006, 05:05 PM	#5
shaggy Senior Member Join Date: October 9, 2004 Posts: 1,519	Colt has used a screw type front pivot pin on some guns that obviates the need for the detent. I'd try and find a screw type front pivot pin.