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Posted: 9/5/2009 8:47:14 AM EST
I have a Spikes ST22 setting on top a Superior arms lower. I keep hearing about the notched hammers not working well with the Spikes. Could someone please educate me?
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Posted: 9/5/2009 9:33:41 AM EST


The AR15 hammer shown has the notch at the upper face of the hammer. The M16 hammer is rounded at the top with no notch.

You can get a non-full-auto un-notched hammer from DPMS. Or you could modify an M16 hammer by removing the tail at the rear of the hammer.
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Posted: 9/5/2009 10:59:55 AM EST
DPMS is the go to source for un-notched hammers.

My Bushmaster, RRA and Eagle Arms hammers are all notched.
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Posted: 9/5/2009 11:44:58 AM EST
Hammers have come with notches to varying degrees. Some will work and some won't. I use a dummy round to test and see if the firing pin will bust the rim of a 22 hard enough to reliably fire. Then cycle the bolt completely to see if it's going to hang up on the hammer. Those are the 2 problems caused by notched hammers. Safest and most reliable thing to do is install an un-notched hammer with a matching trigger.

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Posted: 9/5/2009 3:44:16 PM EST
Originally Posted By StevenH:
DPMS is the go to source for un-notched hammers.
My Bushmaster, RRA and Eagle Arms hammers are all notched.




Brownells has 'em.

Hammer, Mil Spec
* SKU #:231-000-087
* Mfr:DPMS PANTHER ARMS
* Retail Price:$22.99
* Dealer Price:$18.49
* Status:In Stock

DPMS must have sold all they had to Brownells.

A15 Hammer
Model: LR-33K
Sale Price: $21.49
Quantity:
Availability: Out of Stock
This item is currently out of stock. If you choose to order this item, DPMS will ship as soon as possible.
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Posted: 9/5/2009 4:21:36 PM EST
CMMG parts kits also come with unnotched hammers.
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Posted: 9/6/2009 7:42:50 AM EST
The new RRA NM 2-Stage triggers come with the unnotched hammers.

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Posted: 9/6/2009 1:41:08 PM EST
Some (or maybe all new) CMT/Stag LPK's have "no-notch" hammers, too.

I run a DPMS no-notch hammer in my current 9mm setup.

"No-notch" hammer + ramped bolt = smooth as butta!
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