Saw this in a new magazine called "Recoil" and thought it was a great idea. Basically captures the spring in the receiver so if you swap stocks on your AR you dont have to worry about the detent spring flying out.
What you are going to need: 4-40 NC tap, 4-40 x 1/8" set screw, allen wrench (if your set screw is allen head), cap full of fresh motor oil or tapping fluid, tap wrench or something to use as one, paper towels....
1. Make sure rifle is unloaded. Pull the pins and seperate the upper and lower. Set the upper aside.
2. Remove: the stock, buffer tube, buffer detent and spring (set aside, make sure it doesn't shoot across the room when you take out the buffer tube), take down pin spring, detent and pin. Set all of this aside in order, don't lose the small bits.
3. Clean the area free of any debris, I personally used some CLP to spray out the detent hole to clean out any gunk in it.
4. Hold the lower firmly (or better yet clamp it down or in a vice with rags to keep from marring the finish) and dip the tap in the oil, then drip some of the oil into the hole. You want to make sure it is well lubricated.
5. Insert the tap into the hole and MAKE SURE it is STRAIGHT. We are dealing with aluminum which is much less forgiving than steel. Turn it by hand until it catches and you can no longer turn it. I then used a pliers to grip it by the end and turn (its easier to keep it straight than with a wrench). it should start screwing in, and you may see shavings start to come out. After you go a maybe 5 or 6 turns, back out the tap and clean the area out and relubricate. Keep doing this until the tap goes to the desired depth for your set screw. (It ended up being about half the length of the tap for me, it is tapered so its not cutting threads the whole way).
6. After you back the tap out the last time, clean out the area with some CLP and then maybe some compressed air, make sure all the aluminum bits are out.
7. Start to reassemble, put in the take down pin and then detent, spring. Then carefully press in the spring and start the set screw into the threads, tighten it till it is flush with the receiver.
8. Reassemble the rifle! Hooray!
Also if you have a pistol configuration AR you wont need the plate between the reciever and tube now if you dont want it.
Enjoy! only took me about 10 min from tools out to put up.
What you are going to need: 4-40 NC tap, 4-40 x 1/8" set screw, allen wrench (if your set screw is allen head), cap full of fresh motor oil or tapping fluid, tap wrench or something to use as one, paper towels....
1. Make sure rifle is unloaded. Pull the pins and seperate the upper and lower. Set the upper aside.
2. Remove: the stock, buffer tube, buffer detent and spring (set aside, make sure it doesn't shoot across the room when you take out the buffer tube), take down pin spring, detent and pin. Set all of this aside in order, don't lose the small bits.
3. Clean the area free of any debris, I personally used some CLP to spray out the detent hole to clean out any gunk in it.
4. Hold the lower firmly (or better yet clamp it down or in a vice with rags to keep from marring the finish) and dip the tap in the oil, then drip some of the oil into the hole. You want to make sure it is well lubricated.
5. Insert the tap into the hole and MAKE SURE it is STRAIGHT. We are dealing with aluminum which is much less forgiving than steel. Turn it by hand until it catches and you can no longer turn it. I then used a pliers to grip it by the end and turn (its easier to keep it straight than with a wrench). it should start screwing in, and you may see shavings start to come out. After you go a maybe 5 or 6 turns, back out the tap and clean the area out and relubricate. Keep doing this until the tap goes to the desired depth for your set screw. (It ended up being about half the length of the tap for me, it is tapered so its not cutting threads the whole way).
6. After you back the tap out the last time, clean out the area with some CLP and then maybe some compressed air, make sure all the aluminum bits are out.
7. Start to reassemble, put in the take down pin and then detent, spring. Then carefully press in the spring and start the set screw into the threads, tighten it till it is flush with the receiver.
8. Reassemble the rifle! Hooray!
Also if you have a pistol configuration AR you wont need the plate between the reciever and tube now if you dont want it.
Enjoy! only took me about 10 min from tools out to put up.
