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PREFACE: This is something I came up with about 2 months ago after losing & ruining many springs over the years. I don't claim to be the only one who has thought of this, in fact I'd be really supprised if this hasn't already been done here before. But, after doing several searches and communicating with other members & mods, I haven't found anything like this yet.
My blood runs as BLACK with BRD as it gets.I've always marveled at the rifle's ingenious modularity & its "sub-assemblies." Some of these assemblies , however, depend on other "unrelated" parts/assemblies in order to merely stay attached to their respective working areas in the system. There is one, above all others, that I have always just wondered........."Why?" Springs launching as the buttstock is removed, simply because I forgot it was there. New springs getting caught up & twisted beyond recognition as stock is replaced. To top it off, these "headaches" are all a part of making sure the takedown pin doesn't fall out of the weapon!!!! Yes, I'm talking about the rear takedown pin/spring/detent assembly. The modification below eliminates all of the aforementioned. And, it is simplicity defined:
PARTS & TOOLS YOU'LL NEED:
(1)lower receiver
(1)rear takedown pin
Takedown spring & detent
(1)4-40 x 1/8" set screw
1/20" allen wrench
4-40 tap & cutting oil
wire cutters
degreaser
Step 1. With receiver held snug in a vise (pref. w/ magwell vise block), add cutting oil to the 4-40, and carefully tap the rear of the TDS tunnel until you have cut approximately 5/16" in.
Step 2. Spray degreaser (I like GunScrubber) through tunnel to remove all residual cutting debris. I finish it off with a blast of compressed air to dry everything & get rid of any stubborn auminum particles. You should have 5 to 7 clean, even threads.
My blood runs as BLACK with BRD as it gets.I've always marveled at the rifle's ingenious modularity & its "sub-assemblies." Some of these assemblies , however, depend on other "unrelated" parts/assemblies in order to merely stay attached to their respective working areas in the system. There is one, above all others, that I have always just wondered........."Why?" Springs launching as the buttstock is removed, simply because I forgot it was there. New springs getting caught up & twisted beyond recognition as stock is replaced. To top it off, these "headaches" are all a part of making sure the takedown pin doesn't fall out of the weapon!!!! Yes, I'm talking about the rear takedown pin/spring/detent assembly. The modification below eliminates all of the aforementioned. And, it is simplicity defined:
PARTS & TOOLS YOU'LL NEED:
(1)lower receiver
(1)rear takedown pin
Takedown spring & detent
(1)4-40 x 1/8" set screw
1/20" allen wrench
4-40 tap & cutting oil
wire cutters
degreaser
Step 1. With receiver held snug in a vise (pref. w/ magwell vise block), add cutting oil to the 4-40, and carefully tap the rear of the TDS tunnel until you have cut approximately 5/16" in.
Step 2. Spray degreaser (I like GunScrubber) through tunnel to remove all residual cutting debris. I finish it off with a blast of compressed air to dry everything & get rid of any stubborn auminum particles. You should have 5 to 7 clean, even threads.
) You guys have the floor now, so lemmy 'ave 
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