as the title says trying to remove the pins from my barrel/fsb assembly and for whatever reason it is impossible to punch out the pins any tips?
Chad
Printable View
as the title says trying to remove the pins from my barrel/fsb assembly and for whatever reason it is impossible to punch out the pins any tips?
Chad
if I'm not mistaken, the pins are tapered.
drive them OUT from the small end of the pin.
if I'm wrong...someone who knows better chime in...:bad::sad:
These are sometimes in really, really tight. I had a heck of a time driving out the first ones I tried. As already stated, make sure you're hitting the small end of the pins.
That said, I have found it's sometimes easier to press pins out than to hammer them. For instance, with an old SKS that needed the front sight drifted, I could hammer as hard as I pleased without avail. When I bought a sight pusher, it moved easily.
If you're mechanically inclined, you should be able to come up with a jig to hold the punch in place against the taper pin while it's placed in a vise to press the pin out.
Will
They don't seem to be tapered at all it is an olympic arms barrel ( I know..) and are the same size on each side but I'm driving from left to right and have tried right to left (on the other pin) to no avail.
hmm on the jig.
Chad
sometimes its just how hard you can hit them and with what. the first pins i removed where an older QPC which had notoriously hard to remove pins.
i drilled a hole in a piece of hard wood for my punch and used a 1# sledge with a 6in handle. hit them much harder than you think you should.
side note you can find a one pound sledge via sears or snapon chop the handle and if you are your own mechanic its invaluable.
Here's a link to a block to help remove and install check out the video while you are their.
http://www.brownells.com/.aspx/pid=2...HT_BENCH_BLOCK
Sometimes I have found pouring a bit of Kroil on the pins, and letting them soak overnight is quite helpful.
An FSB block from Brownells is often a great help. I have used one and found it to be worth the cash.
Make sure to use the right size punch when hitting them out as well, I installed a handguard on my Noveske and mushroomed a pin getting it out and had to hit it with a file to punch it out, heating the pins may help as well.
another thing i forgot to mention is to look and see if the pins have "splines" on one end or the other.
if they do...you have to drive the pins out from the opposite side from the "splines" or you'll never get them out.
push comes to shove...get a hydraulic jack and fabricate a press to press them out.
if you mushroom them (if they're soft pins) they may have to be drilled out...time to take it to a good AR gunsmith.
- Soak in penetrating oil (just for good measure)
- Brownells FSB block SET ON THE CONCRETE FLOOR
- Big punch, 1/4" or biger
- 2.5-3 lb sledge
- friend to hold the barrel/FSB down
- Long hard swings
Personally though, I like Mark's advice. Considering that your time is worth money do you really want to sink it into that barrel?
Ya beat me to it Rob...
First rule of pin pushing by hand: USE A REALLY BIG HAMMER!
If the first one doesn't to the job... GET A BIGGER ONE!
Had to push the pins on a S&W MP FSB 2 weeks ago. I ended up using a torch to heat the pins ( this was after an overnight soak in penetrating oil) and ultimately used a 5 lb maul to get them to move.
It was WAY too much work .. so I'm making myself a hydraulic press jig to do this in the future.
Work smart.. not hard!
Regards,
TJ
Besides just throwing it away, kroil then hit it with compressed air like the computer cleaner stuff. Turn the can upside down and it blows out some really cold air. Cold = metal shrinkage, hope that works for ya.
Cut it off made it a nice easy decision to go with a dd low profile gas block and troy folding front.
Not going to throw my barrel away , must be nice to have that disposal income.
Chad