HD extractor springs & CRANE O-rings

**VA_Dinger** · #1 07-08-2006, 10:52 PM

Where are you guys buying your replacement heavy-duty extractor springs and CRANE O-rings? I'm down to one spare and need to order a few.

Cold Zero · #2 07-08-2006, 11:08 PM

g and r tactical. $3, a bargain.

Kisara · #3 07-17-2006, 10:10 PM

My springs are from SAW. I get the rings for free from a friend. I have a few I can send your way. Professor, send me a PM.

LukeMacGillie · #4 07-18-2006, 10:03 AM

Last time I was at Crane the word was that they were going with the D-fender as it was cheaper to buy them, then to produce the O-ring to their specifications.

That was in 2004, might have changed since then.

Pat_Rogers · #5 07-18-2006, 10:27 AM

The Reliability Enhancement Kit #2 uses the "O" Ring.

**M4arc** · #6 07-18-2006, 11:09 AM

I get my springs from either SAW or gunsprings.com. The O rings I get from ADCO.

**M4arc** · #7 07-18-2006, 11:23 AM

Quote:

Originally Posted by Pat_Rogers

The Reliability Enhancement Kit #2 uses the "O" Ring.

Pat, my apologies if this has been covered on 10-8 but my memory isn't what it used to be:

Are the "O" rings that Crane uses different than the ones found in Home Depot for instance? Last November I bought a few at Home Depot and took then as spares to the Super Dave Harrington class just in case anyone had issues but I never used them. I have only used the ones I purchased from ADCO because I'm worried about using the Home Depot ones for any length of time.

Thanks.

Ren · #8 07-18-2006, 11:57 AM

Brownells and DPMS carry the wolff extra power springs.

Pat_Rogers · #9 07-18-2006, 12:08 PM

Roger, different. The #60 "O" rings commonly available would work for a short time in a pinch (and i have used a whole bunch of them on my guns as well as others).
Having said that, we were able to purchase a great quantity of the Crane type at a significant savings.

I understand that some Defenders were used. Crane stated that they felt there was no discernable difference in operation and they went to the O rings.
The owner of Defender probably has another view on this, and i have used several Defenders along with "O" rings without issue.

jmart · #10 07-18-2006, 12:14 PM

Sully carries O-rings. These are the synthetic versions that are heat resistant up to 400 degrees or so, chemical resistant, no cheapie rubber ones.

www.defensive-edge.net

**M4arc** · #11 07-18-2006, 12:50 PM

Thanks for the scoop Pat!

Quote:

Originally Posted by jmart

Sully's running a special on O-rings this month. These are the synthetic versions that are heat resistant up to 400 degrees or so, chemical resistant, no cheapie rubber ones. $1 a piece if you can swing that.

www.defensive-edge.net

Thanks jmart!

I see Sully has received some very favorable reviews in SWAT Magazine so I would have no issues ordering from them and the fact that they are selling them for a $1 a piece makes it a no-brainer

Pat_Rogers · #12 07-18-2006, 01:11 PM

Sully is GTG.

twl · #13 07-18-2006, 01:47 PM

Yes, we at MGI do have a different view about using the O-ring, but with the small amount of money I make on the D-Fender, I'm not going to make a big issue out of it.
Fought that battle too many times.

Suffice it to say that while the Crane O-ring can be gotten as an issue item that costs a unit nothing, we get orders in the magnitude of thousands of D-Fenders per year from Spec-Ops units buying them for their entire units with their discretionary funding.
They can get the issue Crane O-ring free, but they spend the money to buy alot of our D-Fenders and replace the Crane O-Rings with D-Fenders.
I guess that says something.

Many go to allied military Spec-Ops units as well.

Run what you like, it's your gun.

jmart · #14 07-22-2006, 12:10 PM

I just ordered three O-rings from Sully. Unfortunately he doesn't list the HD extractor springs and inserts as separate items, he only includes those with his nickeled extractor upgrade kit.

Does the O-ring work well enough with the std rifle spring/blue insert combo, or to get the benefit do you need to pair them with HD springs? My application would be for a BM 16" Patrolman's Carbine Upper, w/carbine length gas system. If I need the HD springs, where's a good place to get just a couple? If I'm not mistaken, SAW requires a minimum purchase order and I don't think just 3-4 springs would qualify.

GIFFMANN · #15 07-22-2006, 12:12 PM

I have a handful of the Crane Springs and O Rings on hand....actually ordered them from Grant in order to have them in stock for folks.

jmart · #16 07-22-2006, 04:09 PM

Thanks, I may be contacting you later this week.

In your experience, do you need to run the HD spring with an O-ring or is it just added insurance?

Aubrey · #17 07-22-2006, 05:23 PM

An alternative to the SAW spring is Wolff, which you can buy in small quantities from Brownells. You should have the BLACK insert in a carbine.

jmart · #18 07-22-2006, 05:37 PM

What barrel lengths require, or are equipped, with the HD/black insert combo? I thought that was the combo to use in anything with a carbine-length gas system, so 16", 14.5" SBRs should all use that combo. I also thought the regular spring/blue insert was std equipment for rifle length gas systems. Am I mistaken?

Aubrey · #19 07-22-2006, 07:46 PM

Quote:

Originally Posted by jmart

What barrel lengths require, or are equipped, with the HD/black insert combo? I thought that was the combo to use in anything with a carbine-length gas system, so 16", 14.5" SBRs should all use that combo. I also thought the regular spring/blue insert was std equipment for rifle length gas systems. Am I mistaken?

jmart: My BAD. BLACK insert for a carbine; blue for rifle. Edited for correction above.

**M4arc** · #20 07-22-2006, 09:42 PM

Quote:

Originally Posted by jmart

Thanks, I may be contacting you later this week.

In your experience, do you need to run the HD spring with an O-ring or is it just added insurance?

In my experience no but it doesn't hurt. If you're running a HD spring and performing regular maintenance you probably don't need an O-ring. But it's extra insurance and that is never a bad thing