Can't get DD Gas Block Taper Pin to Budge!!!!

Scout_Actual · March 28, 2015, 6:04pm

I bought a BMC KMR and I want to install it on my Daniel Defense M4V7. It has a Low Profile Gas Block that is held in place by a Taper Pin (and Roll Pin). I have had a hell of a time trying to get that Taper Pin out. I can’t get it to budge!

Any advice out there?

Thanks,
Scout

straitR · March 28, 2015, 6:07pm

Are you using the right tools and are you on something stable? Have you tried heat?

Heavy_Metal · March 28, 2015, 6:12pm

Are you driving it in the right direction?

Pre-soak everything in Kano Kroil or Deep Creep.

Scout_Actual · March 28, 2015, 6:19pm

It is pretty obvious which side of the pin is small and which is big so I’m confident I’m driving it from the correct side. I spray WD40 on it and let it sit overnight. I even carved out a little channel/pocket in a piece of 2x4 to try and get myself a stable surface. I started out with a regular punch and it bent. Started reading a bit and saw they make concave punches… I don’t have one of those but I did try a nail set to no avail. I haven’t tried heat yet. I guess that will be my next attempt.

Thanks,
Scout

Scout_Actual · March 28, 2015, 6:35pm

I got it! Applied some heat, and then clamped it down a little better and then it came out (using a nail set and a big ass hammer).

Thanks for the help.

Scout

Heavy_Metal · March 28, 2015, 7:02pm

I advise you do not re-use that taper pin and get a replacement.

Scout_Actual · March 28, 2015, 8:32pm

Thanks for the advice. I actually have a fresh taper pin… but it is much longer than the taper pin I popped out of my DD M12 Low Profile Gas Block. Searching the DD site, Midway, and Google I’ve not found reference to anyone selling shorter taper pins.

Thoughts? Am I just not looking in the right spot for short pins? Should I cut this one down? If so do I keep the thicker or thinner side of the pin?

Thanks,
Scout

tostado22 · March 28, 2015, 9:26pm

If you were to cut it down in length I would measure the ends of each then decide which end would be closer to your old pin

Scout_Actual · March 28, 2015, 11:55pm

Ya, I’ve got a set of calipers so I can figure it out easily, I just thought someone might know as part of the answer as to why/how DD uses short Taper Pins and where the come from.

Scout_Actual · March 29, 2015, 10:38pm

Success! BCM KMR13 installed!

trauma · March 29, 2015, 11:28pm

I bought 3 DD barrels with LPGBs and they all came with those short pins, I replaced them with some regular midway ones.

556BlackRifle · March 30, 2015, 1:46am

I remember my first set of taper pins. Now I have a torch, bigass punch and hammer.

Congrats on getting the KMR installed. Now get it out and shoot it!!

m4fun · March 30, 2015, 1:45pm

Stable surface and BFH every time. Heat only for non-upper body days

lahunter57 · March 30, 2015, 4:15pm

How was it getting that barrel nut off? I’ve got a V7 and I’m thinking about switching out the MFR

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Scout_Actual · March 31, 2015, 1:44pm

So do you just have your pins sticking out on either side now?

Scout_Actual · March 31, 2015, 1:46pm

Removing the MFR was easy. I did buy the special DD MFR Wrench from Midway for $10.

Scout_Actual · March 31, 2015, 1:48pm

I’m going to recheck my zero at the indoor range today during lunch!

SteveL · October 3, 2015, 11:41pm

Bumping an old thread here but which way did you have to drive that pin out?

ETA: you remove it left to right. And it was a BITCH.

dramabeats · October 9, 2015, 3:50am

to get the barrel nut off?

SteveL · October 9, 2015, 11:31am

Yes. I was changing the handguard.